A significantly similar DNA, RNA or protein sequence that stems from a common ancestor. See also ortholog and paralog.
a member of a pair corresponding or alike in certain critical attributes.
Characteristics that are similar in different species because they have been inherited from a common ancestor.
a DNA or protein sequence that is similar to another DNA or protein sequence because the sequences have common ancestry
In diploid organisms, one member of a pair of matching chromosomes.
One of a pair of chromosomes, in which one is obtained from the organism's maternal parent and the other from the paternal parent; found in diploid cells.
A member of a chromosome pair in diploid organisms or a gene that has the same origin and functions in two or more species.
(home´ o log´) [Gr. homos: same + logos: word] • One of a pair, or larger set, of chromosomes having the same overall genetic composition and sequence. In diploid organisms, each chromosome inherited from one parent is matched by an identical (except for mutational changes) chromosome—its homolog—from the other parent.
This term is used by geneticists in two different senses: (1) One member of a chromosome pair in diploid organisms, and (2) A gene from one species, for example the mouse, that has a common origin and functions the same as a gene from another species, for example humans, Drosophila, or yeast.
Any member of a set of genes or DNA sequences from different organisms whose nucleotide sequences show a high degree of one to one correspondence
1. One member of a chromosome pair. 2. A gene similar in structure and evolutionary origin to a gene in another species.