Question

In a phenomenon where heterozygotes have features of both the homozygotes, that is an allele is neither dominant nor recessive to the other. Such a phenomenon is termed as

• A. Codominance
• B. Pleiotropy
• C. Test cross
• D. Dominance

Answer 1

Answer: (A)

Codominance

Dominance refers to the property of a gene (or allele) in relation to other genes or alleles. A gene or allele shows dominance when it suppresses or dominates the expression of the recessive gene. There are many forms of dominance: complete dominance, incomplete dominance, and codominance.

Codominance is a form of dominance in which both alleles are simultaneously expressed in the heterozygote thereby resulting in offspring with a phenotype that is neither dominant nor recessive.

So, the answer is A.