For each matching pair of chromosomes, two versions of each gene exist, one from the mother and one from the father. Each version is called an:
A) zygote.
B) gamete.
C) gene pair.
D) allele.

Question

Quizplus · Accepted Answer

Alleles are different versions of the same gene, one inherited from each parent, which is why for each matching pair of chromosomes, there are two alleles for each gene.

For Each Matching Pair of Chromosomes, Two Versions of Each