Incomplete Dominance in Genetic Inheritance

Subject : Biology

Question:

It is a type of inheritance that results in a new heterozygous trait that is a blend of both parents.

A. codominance

B. complete dominance

C. incomplete dominance

D. multiple allele

Expert Verified Solution:

The correct answer is C. incomplete dominance.

Explanation:

Incomplete dominance is a type of inheritance where the heterozygous offspring exhibit a blending of traits from both parents. Neither allele is fully dominant or recessive, resulting in a phenotype that is an intermediate between the two parent traits. For example, if one parent has red flowers and the other has white flowers, their offspring might have pink flowers, which is a blend of both.

In contrast:

Codominance (A): Both alleles are fully expressed, so both traits are visible.
Complete dominance (B): One allele completely masks the effect of the other.
Multiple allele (D): Involves more than two alleles for a gene, but does not blend traits.

This blending effect makes incomplete dominance distinct in genetics.