Definition
adjective
(1) Characterized by having one or more genes without allelic counterparts.
(2) Pertaining to a diploid cell with only one copy of a gene instead of the usual two copies.
Supplement
For example, the male is hemizygous for most X chromosome genes.
Word origin: Greek hēmi- half.
Related forms: hemizygosity (noun), hemizygote (noun).
Compare: homozygous, heterozygous
Definition adjective (1) Characterized by having one or more genes without allelic counterparts. (2) Pertaining to a diploid cell with only one copy of a gene instead of the usual two copies. Supplement For example, the male is hemizygous for most X chromosome genes. Word origin: Greek hēmi- half. Related forms: hemizygosity (noun), hemizygote (noun)...
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