Question

Assertion (A): In Mirabilis jalapa, selfing of F₁ pink flowers produces same phenotypic and genotypic ratio.

Reason (R): Flower colour gene shows incomplete dominance.

Options

• Both assertion (A) and reason (R) are true, and reason is the correct explanation of assertion.

• Both assertion (A) and reason (R) are true, but reason is not the correct explanation of assertion.

• Assertion (A) is true but reason (R) is false.

• Both assertion (A) and reason (R) are false.

Answer 1

Both assertion (A) and reason (R) are true, and reason is the correct explanation of assertion.

Explanation:

Both statements are true. Incomplete dominance gives pink heterozygotes a distinct phenotype, so selfing the F₁ produces matching genotypic and phenotypic ratios of 1 : 2 : 1.