Question

In Four O'clock plant, normal leaves (A) and variegated leaves (B) occur in different plants. If (B) male is crossed with (A) female, the hybrid has normal leaves, but when (B) female is crossed with (A) male, the hybrid has variegated leaves. It is a case of.

• A. Mutation
• B. Cytoplasmic inheritance
• C. Complementary genes
• D. Supplementary genes

Answer 1

Answer: (B)

Cytoplasmic inheritance

Cytoplasmic inheritance occurs only from female to offspring. Hence, when (B) male is crossed with (A) female, the hybrid has normal leaves since (A) female has normal leaves. Also, when (B) female is crossed with (A) male, the hybrid has variegated leaves since (B) female has variegated leaves.

So, the correct answer is 'Cytoplasmic inheritance'.