Question

A plant having 24 cm long internodes is crossed with a plant having 12 cm long internodes. The hybrids have 18 cm long internodes due to

• A. Multiple allelism
• B. Complete dominance
• C. Recessive dominance
• D. Incomplete dominance

Answer 1

The correct option is D Incomplete dominance

Appearance of new phenotypes or intermediate phenotypes, other than parental phenotypes in progeny is incomplete dominance. A plant having 24cm long internodes is crossed with plant having 12cm long internodes. In the hybrids 18cm long internodes appear. It is due to blending of characters. So, it is called Incomplete dominance or blending inheritance.

So, the correct option is ‘Incomplete dominance’.