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hemizygous
hemizygous (ˌhɛmɪˈzaɪɡəs) adj (Genetics) genetics (of a chromosome or gene) not having a homologue; not paired in a diploid cellTranslationshemizygous
hemizygous[¦he·mē¦zī·gəs] (genetics) In diploid organisms, the presence of single copy of a gene; it may be a result of deletion or chromosome loss, or simply may reflect the presence of a single copy of a sex chromosome, such as the X in male mammals. hemizygous
hem·i·zy·gous (hem'ē-zī'gŭs), Pertaining to a gene of which only one copy is present in an organism having diploid cells. In human beings, refers to genes on the X chromosome in males, which are expressed whether dominant or recessive. Synonym(s): hemizygotichem·i·zy·gous (hem'ē-zī'gŭs) Having unpaired genes in an otherwise diploid cell; males are normally hemizygous for genes on both sex chromosomes.
Synonym(s): hemizygotic. hemizygous (of a DIPLOID (2) organism) possessing only one allele of a gene, rather than the normal two. For example, male mammals have only one copy of each gene on the single X-chromosome. see SEX LINKAGE. |