Question

Two true-breeding strains of corn with the genotypes CC and cc are crossed, where C = crunchy phenotype is dominant to c = soft phenotype. The resulting F1 corn are crossed, and the ratio of crunchy to soft phenotypes in the F2 generation is 3:1. This is an example of:
A. non-disjunction.
B. a di-hybrid cross.
C. a mono-hybrid cross.
D. a test cross.
E. complementation.

Answer 1

Answer:

The correct answer will be option-C

Explanation:

A mono-hybrid cross is a cross which is performed to study the pattern of inheritance involving or studying a single trait at a time.

In the given case, the trait studied is the texture of corn seed with two versions that are crunchy and soft phenotypes. The crosses made between them showed 3:1 ratio of crunchy to soft phenotypes in F₂ generation.

Since 3:1 ratio in F₂ generation is obtained in the monohybrid cross therefore, Option-C is the correct answer.