A character or individual defined by its appearance and not by its genetic makeup
The observed appearance of a characteristic. (This may differ from the genotype.)
The characteristics of an animal that can be seen and/or measured (e.g., the presence or absence of horns, the color, or the weight of an animal).
The visual or measurable characteristics of an organism.
The physical expression of the genotype; an organism’s physical characteristics.
the appearance (physical, biochemical and physiological ) of an individual which results from the interaction of the environment and the genotype.
the physical appearance or make-up of an individual.
The visually observed character-istics of an individual physical appearance.
Observable characteristic of a person. (44)
The observable character of a cell or an organism.
Measurable functional and structural characteristics of an organism as determined by the interaction of the genotype with the environment.
an organism described by its external appearance.
The totality of observable characteristics of a person. Compare with genotype.
The observable properties of an organism, resulting from the interaction between the organism's genotype and the environment in which it develops.
observed visible (expressed) characteristics passed from generation to generation for a particular trait.
adjective PHENOTYPIC): visible characteristics and/or behavior that result from the interaction of an organism's genetic "blueprint" (genotype) and the environment. Phenotypic resistance testing determines whether an organism responds to a specific drug.
Manifestation of a genotype, or genetic instruction, or the combined manifestation of several different genotypes. Phenotype is the immediate cause of genetic disease and object of genetic selection.[close window
the outward, physical appearance of a cat, as distinct from the genetic make-up, or genotype, which is often quite different.
An organism judged by its visible characters. Cf . Genotype. ( BCFT .).
The observable physical or biochemical traits of an organism, as determined by genetics and the environment; the expression of a given trait based on phenotype; an individual or group of organisms with a particular phenotype.
Observable properties of an organism produced by the genotype in conjunction with the environment.
the entire physical, biochemical, and physiological makeup of an organism as determined by both genetics and the environment.
A type determined by visible characteristics which are common to a group and which result from the interaction of environmental factors with the hereditary characteristics.
The observable properties of an individual - how big they are, and so on. This is the result of both the environment they grew up in, and their genotype.
A term relating to the appearance of an animal as opposed to its genetic makeup.
The observable characteristics of an organism, derived from the interaction of its genotype and the environment.
Physical characteristics that are genetically determined.
An organism's appearance or observable character. The phenotype represents the physical characteristics into which genes are translated.(FR:Phénotype, IT:Fenotipo )
(feh-NEH-type) The physical and physiological makeup of the organism 'what you see, how the genes are expressed'
the expression of an organism's genotype in terms of morphology, physiology, behavior, etc., determined by the interaction between genotype and environment.
The overt appearance and behavior of an organism, regardless of its genetic blueprint. See also genotype.
The observed character of an individual without reference to its genetic nature. Individuals of the same phenotype appear alike but may not breed alike.
The physical and/or biochemical characteristics of a person, an animal or other organism which are determined by their genetic makeup and/or environment.
The expressed characteristics of an organism. Not all genes of the genotype affect the phenotype. (Visual appearance)
The aggregate of all the expressed properties of a cell, being the product of the interaction of the genotype with the regulatory environment.
An observable characteristic displayed by an organism. These characteristics can be controlled by genes, by the environment, or a combination of both. The characteristic can be directly observable, such as having brown eyes. In some cases, the phenotype will be measurable, such as having high blood pressure. OMIM is an on-line catalog of human phenotypes
The way in which genes are expressed in organisms. Differs from genotype in that the phenotype of an individual is what one actually sees.
the realized expression of the genotype; the observable expression of a trait which results from the biological activity of proteins or RNA molecules transcribed from the DNA.
A visible, or otherwise measurable, physical or biochemical characteristic of an organism, resulting from the interaction between the genotype and the environment.
Expression of any of those genes as a physical, biochemical or physiological trait.
The visible signs of a gene. For example, if the genotype was BB, the phenotype would be blue eyes.
All aspects of a living thing other than its genetic constitution.
The observable structure of an organism determined by its genetic make up
The visible, physical expression of a genetic trait, e.g., blue eyes or red hair.
the visually observed characteristics of an individual; physical appearance.
What a cat LOOKS like, rather than what its genetic makeup is.
Outward appearance, assuming controlled result.
The physical and behavioural characteristics of an organism that arise from its genes (the genes make up the genotype), the interaction of many genes and the influence of the environment on the genes.
the sum of the observable characteristics of an organism.
The total characteristics displayed by an organism under a particular set of environmental factors, regardless of the actual genotype of the organism. Results from interaction between the genotype and the environment.
The characteristics of a person, such as eye color, height, or disease state. Phenotype is determined through the interaction of an individual's genotype and his or her environment.
The distinguishable characteristic(s) of a genetically controlled trait.
The expression of the genes present in an individual. This may be directly observable (eye color) or apparent only with specific tests (blood type). Some phenotypes such as the blood groups are completely determined by heredity, while others are readily altered by environmental agents.
the observable expression of genotype; physical characteristics of an organism, determined by the genetic makeup and influenced by interactions between genes and internal and external environmental factors
The physical manifestation of a gene function.
The observable characteristics of a genetically controlled trait.
The plant as observed. The product of the interaction of the genes of an organism (the genotype) with the environment.
The entire set of observable characteristics of an organism or cell; the physical traits of an organism. The genotype, together with environmental factors, defines the phenotype.
Observable characteristics of an organism produced by the interaction of the organism’s genotype and its environment. For example, hair type, eye color, height.
The outward appearance or behaviour of an organism (e.g. virus or human). The phenotype depends partly on the organism's genotype and partly on the environment (e.g. nutrients, temperature). Drug resistance in HIV is the phenotypic expression of resistance genes.
The biochemical, physiological and physical characteristics of an individual, as determined by the genotype and the environment in which it is expressed; also, in a more limited sense, the expression of some particular gene or genes.
Entire physical, biochemical, and physiological makeup of an individual, which is determined both genetically and environmentally; as opposed to genotype.
The observed characteristics of an individual, often reflecting the effects of environmental conditions on genotypic expression.
The observable biochemical, anatomical and behavioral traits of an organism, as determined by its genotype in conjunction with its environment.
the physical traits of an organism controlled by the interaction of the gene with the environment.
n. (Gr. phainein, to appear; typos, image) the characters of an organism due to the interaction of genotype and environment, a group of individuals exhibiting the same phenotypic characters. The detectable expression of the interaction of genotype and environment constituting the visible characters of an organism.
A heritable genetic trait such as eye color or blood type, or an inherited disease.
the expression of genes and the physical characteristics that result.
The whole expression of the dominant genes forming the appearance of an individual. It is the result of the interaction between the expression of the genes and the environment.
the genetic characteristics of the outward manifestations of a gene. These are expressed through the proteins encoded by the genes. When two different variants of the same gene are present, the phenotype of the dominant form will be expressed.
The outward appearance of an organism, what it looks like or how it behaves. A significant proportion of the phenotype is determined by the genotype, the rest it caused by interaction with the environment of the organism.
defined principally by the HA and NA proteins, but also by biologically manifest properties of the virus such as inhibitor sensitivity, etc.
An organism's evident traits, its "manifest biology"-anatomy and physiology.
the observable or detectable physical characteristics of an organism; the detectable expression of the genotype.
the characteristics of an organism (eg, blue eyes; zidovudine resistance)
(fee´ no type) [Gr. phanein: to show] • The observable properties of an individual as they have developed under the combined influences of the genetic constitution of the individual and the effects of environmental factors. (Contrast with genotype.)
Visible characteristics expressed in an animal.
The outward appearance of an individual.
The type of RNA in a biological sample as described by physical characteristics of the biological sample, e.g. time or estrogen presence/absence or observed susceptibility to disease.
The observable characteristics of an organism; the product of both genes (genotype) and environment.
Observable characteristics (traits) of an organism, see also Genotype
In the locus page, "phenotype" refers to the observable traits of strains that carry a mutation at that locus.
The observeable characteristics of a cell or organism.
The physical constitution or description of an individual (or a cell) (of genotype).
The "outward, physical manifestation" of the organism. Basically its "LOOK". This is the physical aspect of the animal and is the sum of the atoms, molecules, macromolecules, cells, structures, metabolism, energy utilization, tissues, organs, reflexes and behaviors; anything that is part of the observable structure, function or behavior of a living organism.
physical/biochemical characteristics of an organism, as determined by genetic make up and environmental influences.
The visible (and other physical) characteristics of an organism that are produced by the interaction of the organism's genes and environmental factors; the expression in a particular individual belonging to a species of the inherited characteristics of the species, as modified by environment and developmental processes.
the observable constitution or appearance of an organism.
Traits expressed by an individual.
The actual appearance or characteristics of an organism, the result of the interaction between the organism's genotype and its environment.
The entire physical, biochemical, and physiological makeup of an individual as determined both genetically and environmentally, as opposed to genotype.
what an organism looks like as a consequence of its genotype; two organisms with the same phenotype can have different genotypes
an organism's expressed physical traits
a particular trait or characteristic of a plant
a visible, noticeable, and recognizable trait
a visual or behavioral observation that results from the interaction of the species' genetic make-up and environment
a way to measure an observable trait or behavior
The physical and/or biochemical characteristics caused by a particular gene variant.
Clinical information and characteristics about an individual (vs, "genotype," which is genetic information). Phenotypes are the observable traits of an organism, such as hair color, weight, or the presence or absence of a disease.
An individual's physical characteristics such as hair color, height or state of health. These traits are not necessarily genetically based.
The visible characteristics of an organism produced by the genotype and the environment, such as height and hair color.
the traits (physical, biochemical, behavioral, etc.) of an organism controlled by the interaction of its genes with the environment.
an organism's inherited physical appearance.
The organism-level traits and characters of a species or individual organism. There are typically economically important, if they function in natural selection, but it is held by some that not all phenotypic traits are selectively biassed. Phenotypic traits are the result of the expression of the genes of the organism. Sometimes a trait is actually a 'norm of reaction', for it may be expressed in different ways in different environments (eg, height depending on diet).
Usually "body" but actually the entire constitution of an individual (anatomical, physiological, behavioral) resulting from the interaction of the genes with the environment. As Dawkins emphasized in The Extended Phenotype, can even include such things such as bird nests.
The observable physical and biochemical characteristics or traits of an organism such as hair color, blood type, or the presence or absence of a disease. The phenotype is determined by both genetic and environmental influences.
The observable characters of an organism due to genetic and environmental effects on development. See genotype.
A set of observable characteristics of an individual or group as determined by its genotype and environment.
The physical or biochemical characteristics of an individual resulting from the interaction between its genotype and the environment.
The form of the organism. A result of the combined influences of the genotype and the environment on the self-organizing internal processes during development.
The observable appearance of a trait or the overall appearance of an individual.
outward appearance or physical attributes of an organism resulting from both the effects of the environment and genetic makeup.
An observable trait of an organism resulting from the interplay of environment and genetics. In pharmacogenetics, variable efficacy and adverse reactions are phenotypes of interest.
the observable appearance and properties of an individual as determined by the interaction of the genetic and environmental influences.
Traits that are outwardly observable, such as hair colour and height. Phenotypic traits aren't always inherited.
The expressed characteristics, or an expressed character of an organism due to its genotype.
The outward, physical manifestation of the organism. In this study, eight phenotypic categories were used: agronomic properties, bacterial resistance, fungal resistance, herbicide tolerance, insect resistance, product quality, virus resistance, and other.
The physical or biological characteristics of an organism arising from the interaction of its genotype and environmental factors.
The observed characteristics of an individual that are the result of genes and environmental influences.
The outward physical characteristics of an organism.
FEEN-o-type Observable expression of a genotype. 265
The product of the interaction between genotype and the environment. E.g., your body.
Total appearance of an organism, determined by interaction during development between its genetic constitution (genotype) and the environment.
The entire physical, biochemical, and physiological makeup of an individual as determined by his or her genes and by the environment in the broad sense.
The observable characteristics of an organism due to the interaction between the genotype and the environment.
The appearance (or other measurable characteristic) of an organism that results from interaction of the genotype and environment.
observable characteristic of an organism, for example red flowers (whereas genotype—attributable to the genes)
Traits, such as hair and eye color and disease, that are observable externally. These traits are not always inherited.
The physical expression of the characteristics produced by genes present in an individual. Eye color, blood type, and hair color are examples of phenotypes produced by genes. Phenotypes can also refer to the actual protein produced by a certain gene.
refers to the outward appearance or characteristics of an organism including behavior which is determined by the DNA of its genotype.
The actual appearance of an organism; its manifested attributes. Contrasted with the genotype, which is the particular genetic material the organism has inherited from its parents.
The visible characteristics of an individual that are attributed to genes or combinations of genes. For example, eye color and hair texture are phenotypes.
the actual characteristic appearance or behavior of an organism produced by the genotype in conjunction with the environment.
The visible characteristics of an organism (for example, height and coloration).
the appearance of inherited traits in an organism
The observable traits or properties of an organism. Refers to both genetic and non-genetic traits. Often used to refer to a single trait. For example: "My phenotype is hairy knuckles and my genotype is Hh." See genotype.
The physical characteristics of a cell or organism that is the result of its unique genotype.
A description of an organisms charateristics (regardless of hidden/carried recessives).
the clinical presentation or expression of a specific gene or genes, environmental factors, or both.
The observable traits of an organism. The phenotype results from the combination of genetic and environmental factors
The observable characteristics or clinical symptoms present in a patient with a particular genetic mutation.
The observable characteristics of a cell or organism as distinct from its genotype.
The physical expression of an organism's genotype.
characteristics and growth properties of HIV-1
the outward visible expression of the genetic makeup of an organism.
adj. phenotypic: the observable physical or biochemical characteristics of an organism or group, as determined by both genetic makeup and environmental influences
is the physical manifestation of a genetic trait, resulting from a specific genotype and its interaction with the environment.
The manifest characteristics of an organism collectively, including anatomical, psychological, etc. traits, that result from both its heredity and its enviroment.
An observable characteristic - it is the physical manifestation of the genotype (gene-type).
The observable characteristics of an individual. The expression of these characteristics results from the interaction of genetic and environmental factors.
The biochemical, physiological, and physical characteristics resulting from the interaction of genotype with environment.
The observable physical or biochemical characteristics of an organism, as determined by both genetic makeup and environmental influences. b. The expression of a specific trait, such as stature or blood type, based on genetic and environmental influences.
Phenotype is the set of characters of an organism that are displayed under specific environmental conditions. The phenotype includes the morphological, physiological, behavioral, biochemical, and other characteristics of an organism - traits that are exhibited because of both genes and the environment. (Compare with genotype.)
The actual apparent organism, in contrast to the genotype, the genetic information upon which the phenotype is based.
The appearance of an organism. Having purple flowers is a phenotype while the plant's genotype may be heterozygous.
A classification system that measures what a creature can do without ever checking how it is done. In other words, the phenotype reflects gestation time, tasks completed, and the like, but never takes into account the actual source code (the genotype).
The appearance of an individual, which results from the interaction of the person's genetic makeup and his or her environment. By contrast, the genotype is merely the genetic constitution (genome) of an individual. For example, if a child's genotype includes the gene for osteogenesis imperfecta (brittle bone disease), minimal trauma can cause fractures. The gene is the genotype, and the brittle bones themselves are the phenotype.
A detectable characteristic of an organism. Hair and eye color are phenotypic traits.
the observable properties of an organism, determined by the genotype in combination with the environment.
The sum of a person's physical and physiological characteristics is called their phenotype.
The observed properties or outward appearance of a trait. The physical expression of the alleles posessed by an organism.
The observable properties of an organism resulting from the function of its genes, and their interaction with the environment.
The appearance of an animal, which is generally dependent on its genotype.
Any observable feature of an organism that is the result of one or more genes.
The physical characteristics of an organism or the presence of a disease that may or may not be genetic. See also: genotype
visible characteristics and/or behavior that result from the interaction of an individual's genetic "blueprint" (genotype) and the environment. Contrast with genotype.
Observable characteristics, resulting from interaction between an organism's genetic make-up and the environment. Cf. Genotype.
the appearance of an individual resulting from an interaction of genetic and environmental influences
Observable characteristics of an organism produced by the organism's genotype interacting with the environment.
Observable physiological behavior of an organism.
the characteristics actually displayed by an organism (contrast with genotype)
a manifest trait or ability exhibited by a cell or organism that is determined by that cell or organism’s genes
The detectable outward manifestation of a specific gene or set of genes carried by an organism.
The visible properties of an organism.
all the observable traits a person inherits, as opposed to the genome, or all the traits inherited.
an organism as observed by its visible characteristics, resulting from the interaction of its genotype with the environment.
the aggregate of all the observable characteristics of a cell or organism. The phenotype results from the expression of a subset of a cell's genome.
The clinical expression; often used when talking about a genetic condition.
a person's or organism's observable traits and characteristics, for example, hair color, weight, or the presence or absence of a disease.
The actual physical constitution of an organism; the outward appearance partly generated by its genes (its genotype) during development and physical factors such as environmental changes.
The observable physical and biochemical characteristics of an organism, determined by an interaction between genotype and environment.
the way an organisms genes express themselves; either short, tall, green, etc (physical type).
The physical and physiological traits of an organism.
The visible or measurable expression of a character; for example, 21-day litter weight, postweaning gain, reproduction, etc. Phenotype is influenced by genotype and environment.
An observed category or measured level of performance for a trait in an individual.
Blaming what we end up expressing ourselves as.
The observable physical and/or biochemical characteristics of the expression of a gene; the clinical presentation of an individual with a particular genotype Related Terms: allelic heterogeneity ; dysmorphology ; genotype ; genotype-phenotype correlation ; locus heterogeneity ; variable expressivity
the physical characteristics of an organism; the outward expression of characteristics conferred on an organism by its genotype. cf. genotype.
the measurable characteristic of an organism that results from the interaction of the its genetic makeup with the environment.
The observable or measurable traits of an individual as produced by its genotype and the environment.
The actual appearance, behavior, or activity of an organism. HIV's phenotype is affected by its genotype; mutations in its genetic structure can alter its behavior. See also Genotype.
External (visible and measurable) manifestation of the genetic material of an individual.
entire physical, biochemical and physiological makeup of an individual determined by a combination of genetics and environment.
The visible characteristics (e.g. eye color) that are produced by the interaction of the genotype (the genetic constitution of an organism) and the biologic environment.
The functional capabilities and outward appearance of a microorganism. It is the physical expression of the genotype.
The observable characteristics of an individual, resulting from the interaction between the genotype and the environment in which development occurs.
The observable structural or functional characteristics of an individual organism that result from the interaction of its genotype with environmental factors.
The observable features of an individual as they reflect the genotype of that individual and the effect of the indivual's environment.
the appearance of an animal (e.g., red coat colour); to be contrasted with the genotype, the genes carried by an animal (e.g., black/red).
The effect made on the organism by the genes that it carries. Some genes (see genotype) may have no effect.
Observable characteristics of an organism, the expression of gene alleles (genotype) as an observable physical or biochemical trait
The observable characteristics of an organism determined by genetic makeup and environmental factors. For example, the specific AAT protein found in the blood is determined by the AAT genes passed to the individual by the mother and father.
The physical and clinical visible characteristics of an individual. Genotype is the genetic composition. Phenotype is its observable appearance.
is what the dog's visual genetic makeup appears to be.
The appearance of the individual rabbit.
a set of observable physical characteristics of an individual organism. A single characteristic can be referred to as a "trait," although a single trait is sometimes also called a phenotype. For example, blond hair could be called a trait or a phenotype, as could obesity. A phenotype can be the result of many factors, including an individual's genotype, environment, and lifestyle, and the interactions among these factors.; The observed manifestation of a genotype. The phenotype may be expressed physically, biochemically, or physiologically. [Source: NHBLI/NCBI Glossary
Appearance; entirety of features resulting from interactions of genetic information
The observable expression of a genetically determined trait. The trait may be visibly apparent, such as hair color, or detectable with a laboratory test, such as blood type.
The observable characteristics of an organism (including physical, biochemical or other traits) which may result from the interaction of the organism with its environment.
the characteristics of an individual that are produced by the interaction of genotype and environment.
Characteristics of an organism that result from the interaction between an organism's genotype and the environment.
The physical result or expression of the genotype. By identifying the phenotype of HIV using a phenotypic resistance test, a person's sensitivity to antiretroviral drugs can be measured.
The physical manifestation of a genotype within an animal. A mutant phenotype is caused by a mutant genotype and is manifested as an alteration within an animal that distinguishes it from the wild-type.
The visible characteristics or traits of an organism. Phenotypic traits are not necessarily entirely genetic and are produced by its genotype interacting with the environment.
The outwardly observable characteristics of a cell or organism.
the outward expression of a gene
The physical appearance of a hamster.
The physical traits of an organism that are determined by the genotype.
The morphological, physiological, biochemical, behavioral, and other properties of an organism, manifested throughout its life.
expression of a gene as a trait
the overt expression of an individual's genetic inheritance, which may also show the influence of the environment. (109)
All properties of organisms which are not genetic information.
The appearance. What the dominant genes express.
The observable traits or characteristics of an organism, for example hair color, weight, or the presence or absence of a disease. Phenotypic traits are not necessarily genetic.
The visible or measurable characteristics of an organism.
(1) The form taken by some character (or group of characters) in a specific individual. (2) The detectable outward manifestations of a specific genotype.
is the appearance or other characteristics of an organism, resulting from the interaction of its genetic constitution with the environment.
The morphological, physiological, behavioral, and other outwardly recognizable adaptations of an organism that develop through the interaction of genes and environment. See also: genotype.
The expression of structure, function, or behavior of an organism or cell.
The observed biochemical, physiological, and physical characteristics of an individual, as determined by his or her genotype and the environment in which it is expressed.
The outward visible expression of the hereditary constitution of an organism.
the way an organism looks.
The detectable outward manifestation of a psecific genetic trait or genotype.
The appearance of an individual for one or more traits, which is the product of the interaction of the individual's genes and its environment.
The observable structural and functional characteristics of an organism determined by its genotype and modulated by its environment. Nagel et al. (eds), 1991 RT genotype
a set of genes possessed by a particular group
Visible characteristics or traits of an organism, like a plant or an animal.
Manifested attributes of an organism (e.g., eye colour).
the genetically and environmentally determined appearance of an organism.
The expression of gene alleles (genotype) as a detectable physical or biochemical trait
The physical expression of an individual's genotype.
The physical appearance or makeup of an individual.
appearance or other characteristics of an organism, which result from interactions of its genetic constitution with the environment.
An individual's physical characteristics determined by the interaction of genotype and environmental factors.
The totality of characteristics of an individual; its appearance as a result of interaction between genotype and environment.
The observable properties and physical characteristics of an organism
The observable appearance of an individual; the physical expression of the genotype.
The outward appearance of a cat. Two individuals with the same phenotype may not necessarily have the same genotype. See GEOTYPE.
The observable characteristics resulting from a particular genotype as influenced by environmental factors.
the characteristics of an organism displayed under specific environmental factors.
The observable traits of characteristics of an organism, such as hair color or weight, or the presence or absence of a disease. Phenotypic traits are not necessarily genetic.
The measurable genetic markers in a given individual at a specific locus. It may or may not reflect the actual alleles present (see genotype). Example: a person with type A blood is said to have the A phenotype but could have the AO genotype.
The physical or outward appearance of the genotype
The genetic makeup of an organism such as HIV as it interacts with the environment. In the case of HIV, the virus may interact with cells and drugs. Phenotypic resistance testing determines whether an organism is susceptible to a specific drug in a test tube. Contrast with genotype.
an individual's physical and other characteristics determined by his or her genotype
The outward production of the genotype, combined with environmental influences.
physical appearance of an organism
an observable characteristic or behavior (e.g., the personality of an individual). In HIV, phenotype normally refers to drug resistance or susceptibility.
The outward appearance of the individual. It is the product of interactions between genes and between the genotype and the environment.
The detectable characteristics associated with a particular genotype and its environment.
The observable traits or characteristics of an organism (e.g., hair colour, weight) or the presence or absence of a disease. Phenotypic traits are not necessarily genetic. [ Talking Glossary
The observable characteristics of an organism, either in total or with respect to one or more particular named characteristics. ( 16)
The appearance and behavior of an organism; the product of its genotype and the environment in which it develops.
The expressed characteristics of an individual (cf. genotype).
Physical or visible characteristics of a living organism that are determined by its genotype.
Observable and measurable characteristics and traits of an individual; a product of the interaction of the genotype with the environment.
The appearance of a specific characteristic in an organism as determined by its genotype.
The physical constitution of an organism as determined by the interaction of its genetic constitution and the environment.
In genetics, the characteristics that are displayed by the individual organism?such as eye color or intelligence?as distinct from those traits that one may carry genetically but not display. See also genotype.
The physical or functional characteristics of an organism, produced by the interaction of genotype and environment during growth and development.
The phenotype of an individual organism is either its total physical appearance and constitution or a specific manifestation of a trait, such as size, eye color, or behavior that varies between individuals. Phenotype is determined to a large extent by genotype, or by the identity of the alleles that an individual carries at one or more positions on the chromosomes. Many phenotypes are determined by multiple genes and influenced by environmental factors.