hemizygous

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Related to hemizygotic: monozygotic

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): hemizygotic

hem·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.