Question

Choose the wrong one out.

(a) Codominant genes are never haplosufficient

(b) Dominant phenotype is expressed when a gene is haplosufficient

(c) Incomplele dominance is the presence of haplosufficiency

(d) In homozygous condition an allele can express its phenotype be it the dominant or recessive allele in nature

This question was addressed to me during an interview.

I'd like to ask this question from Incomplete Dominance and Codominance in portion Extension and Deviation from Mendelian Genetic Principles of Cytogenetics

Answer 1

The correct choice is (c) Incomplele dominance is the presence of haplosufficiency

Explanation: Haplosufficiency is the condition when an allele can express itself fully and produce its phenotype completely even in heterozygous condition. Incomplete dominance results from lack of haplosufficiency.