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In Four O' Clock plant, norma leaves (A)...

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

A

Mutation

B

Cytoplasmic inheritance

C

complementary genes

D

supplementary genes.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the inheritance of leaf traits in the Four O' Clock plant, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Traits**: - There are two types of leaves: normal leaves (A) and variegated leaves (B). - The plants with these traits are distinct, meaning normal leaves and variegated leaves occur in different plants. 2. **Analyze the Crosses**: - When a male plant with variegated leaves (B) is crossed with a female plant with normal leaves (A), the resulting hybrid has normal leaves (A). - Conversely, when a female plant with variegated leaves (B) is crossed with a male plant with normal leaves (A), the resulting hybrid has variegated leaves (B). 3. **Determine the Inheritance Pattern**: - The key observation here is that the trait of the hybrid depends on the female parent. This suggests that the trait is inherited from the mother. - In both crosses, the hybrid's leaf type matches the female parent's leaf type. 4. **Identify the Type of Inheritance**: - The inheritance pattern where traits are passed down from the mother only is known as cytoplasmic inheritance. - This type of inheritance is associated with traits that are transmitted through the cytoplasm, such as those found in organelles like mitochondria. 5. **Conclusion**: - Based on the observations and analysis, the correct answer to the question is that this is a case of **cytoplasmic inheritance**.
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