- having dissimilar pairs of genes for any hereditary characteristic.
- of or relating to a heterozygote.
Also het·er·o·zy·got·ic [het-uh-roh-zahy-got-ik] /ˌhɛt ə roʊ zaɪˈgɒt ɪk/.
Origin of heterozygous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for heterozygous
The female is heterozygous for a dominant factor (F) which is lacking in the male.Mendelism
Reginald Crundall Punnett
Since no "pinks" appeared the color is recessive, and the brother was not heterozygous for it.
Although the mother was fertilized by a normal male, every daughter is heterozygous for one or the other of the lethal factors.
This shows that the mother of the original high sex-ratio was heterozygous for a recessive sex-linked lethal.
This heterozygous bar female is always readily distinguishable from the normal, but can not always be separated from the pure bar.
- genetics (of an organism) having different alleles for any one geneheterozygous for eye colour Compare homozygous
Word Origin and History for heterozygous
Online Etymology Dictionary, © 2010 Douglas Harper
- Having different alleles at one or more corresponding chromosomal loci.
- Of or relating to a heterozygote.
- Relating to a cell that has two different alleles at corresponding positions on homologous chromosomes. Compare homozygous.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.