First slide

Inheritance of One Gene

Question

Phenotype of the heterozygote reflects the phenotypes of both homozygotes for different traits in:

Easy

A

Dominance
B

Incomplete dominance
C

Codominance
D

Polygenic inheritance

Solution

In codominance, phenotype of the heterozygote is shown by the phenotypes of both parental homozygotes. The AB blood group is a classic example of codominance where both $I^{A}$ and $I^{B}$ alleles of gene I express themselves.

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