As in any X-linked trait in males, absence of a homologous counterpart for an allele. It may also result from deletion. hepatotoxic - Toxic to the liver.
The situation in which an individual has only one member of a chromosome pair or chromosome segment, rather than the usual two. Normal men (with XY sex chromosomes) are hemizygous for genes on the X chromosome.
The situation in which an individual has only one member of a chromosome pair or chromosome segment rather than the usual two; refers in particular to X-linked genes in males who under normal circumstances have only one X chromosome Related Terms: X-linked dominant ; X-linked recessive ; heterozygote ; homologous chromosomes ; homozygote
A condition of being neither homozygous nor heterozygous for an X-linked allele, as in males with only one X chromosome.
Having only one copy of a chromosome rather than the usual two.
Having one or more genes that have no allele counterparts. Usually applied to genes on the male's X chromosome (in humans).
Having only one copy of a particular gene. For example, in humans, males are hemizygous for genes found on the Y chromosome.
(hem´ ee zie´ gus) [Gr. hemi: half + zygotos: joined] • In a diploid organism, having only one allele for a given trait, typically the case for X-linked genes in male mammals and Z-linked genes in female birds. (Contrast with homozygous, heterozygous.)
the condition of loci on the X chromosome of the heterogametic sex of a diploid species
in a diploid organism, a hemizygous individual has only one copy of a particular gene. For example, in humans all cytogenetically normal males are hemizygous for X and Y loci not in the pseudoautosomal region. [Source: NHBLI/NCBI Glossary
The hen, having only one Y-chromosome.
Having only one instead of a pair of genes of a particular kind due to a loss of DNA. This condition is normal in sex linkage.
A term used when describing the genotype of a male with regard to an X-linked trait, since males have only one set of X-linked genes.
