Question

Assertion: In Mirabilis, plastid inheritance takes place only through the female.
Reason: Inheritances of cytogenes are biparental.

• A. Both assertion and reason are true and the reason is a correct explanation of the assertion
• B. Both assertion and reason are true but the reason is not a correct explanation of the assertion
• C. Assertion is true but the reason is false
• D. Both assertion and reason are false

Answer 1

The correct option is C Assertion is true but the reason is false

The assertion is true because in Mirabilis, plastid inheritance takes place only through the female; but the reason is false because the cytoplasmic inheritance is uniparental, not biparental.
The plastid colour always depends on the egg, not on the pollen. The cross between a variegated plant and a green plant represented below proves that the plastid inheritance depends only on the egg (uniparental).