heterozygote
Americannoun
noun
Other Word Forms
Etymology
Origin of heterozygote
Explanation
A heterozygote is a living thing that has two different versions of a given gene. If a cat inherits a gene for black fur from its mother and one for gray fur from its father, it is a heterozygote. The different forms of a gene are called alleles. Organisms inherit one allele for each gene from their biological parents. If those genes are different — e.g., one for gray fur, and one for black fur — the offspring is a heterozygote with respect to fur color. What color fur will a heterozygous cat have? It depends on which gene is dominant. Since the gene for black fur is dominant, the cat would be black. However, the cat could pass on the non-dominant, or recessive, gene to its offspring.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The probability of the homozygote or the heterozygote is 1/4 + 1/2 = 3/4 using the sum rule.
From Textbooks ● Jun. 9, 2022
For instance, the recessive lethal Curly allele in Drosophila affects wing shape in the heterozygote form but is lethal in the homozygote.
From Textbooks ● Jun. 9, 2022
Thus, there are four equally likely gametes that can be formed when the YyRr heterozygote is self-crossed, as follows: YR, Yr, yR, and yr.
From Textbooks ● Jun. 9, 2022
Coat color depends on the A gene, which shows dominance, with the recessive homozygote showing a different phenotype than the heterozygote or dominant homozygote.
From Textbooks ● Apr. 25, 2013
The formula for the F1 heterozygote was therefore BbB′b′.
From Being Well-Born An Introduction to Eugenics by Michael F. Guyer
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
