Question

Choose the correct answer from the alternatives given.
Consider a cross in which a trait is inherited by incomplete dominance. What percentage of the $F_2$ from the mating of homozygous dominant and homozygous recessive, What percent of individuals will possess the dominant phenotype ?

• A. 100 percent
• B. 25 percent
• C. 50 percent
• D. 75 percent

Answer 1

The correct option is B 25 percent

In incomplete dominance, the offsprings with the heterozygous genotype show the intermediate character. When a homozygous dominant and a homozygous recessive individual are mated in such a condition the F2 generation will show a genotypic and a phenotypic ratio of 1:2:1 for homozygous dominant, heterozygous and homozygous recessive offsprings respectively. So, the percentage of homozygous dominant will be, 1/4 X 100 = 25%. So, the correct option is '25 percent'.