Question

The expression of a mixture of the dominant and the recessive trait in an individual is referred to as ____.

A) Incomplete Dominance

B) Codominance

C) Polygenic Inheritance

D) Epistasis

Answer 1

Incomplete dominance is when a heterozygote has a phenotype that blends the dominant and recessive traits, whereas codominance is when both alleles are fully expressed.

Step-by-step explanation:

The expression of a mixture of the dominant and the recessive trait in an individual is referred to as incomplete dominance. In incomplete dominance, a heterozygous genotype expresses a phenotype that is intermediate between dominant and recessive phenotypes, rather than displaying only the dominant trait. An example of this is the blending of colors in carnation flowers where a cross between a dark purple and a white flower results in offspring with light purple flowers. In contrast, codominance refers to a scenario where both alleles in the heterozygote are fully expressed, such as the ABO blood group antigens where both type A and type B alleles are expressed in a type AB individual.