Question

Explain the following term with an example.

Incomplete dominance

Answer 1

Incomplete dominance is a phenomenon in which one allele shows incomplete dominance over the other member of the allelic pair for a character. For example, a monohybrid cross between the plants having red flowers and white flowers in the Antirrhinum species will result in all pink flower plants in the F₁ generation. The progeny obtained in the F₁ generation does not resemble either of the parents and exhibits intermediate characteristics. This is because the dominant allele, R, is partially dominant over the other allele, r. So, the recessive allele, r, is also shown in the F₁ generation, leading to the creation of pink flowering offspring with the Rr genotype.