Question

How many mitotic divisions take place during the formation of a female gametophyte from a functional megaspore?

• A. One
• B. Two
• C. Three
• D. Four

Hint:

Two mitotic divisions are key in the formation of a female gametophyte from a single functional megaspore in flowering plants.

Answer 1

The Correct Option is B

Step 1: Understanding the formation of female gametophyte.
In flowering plants, the female gametophyte (embryo sac) is formed from a single functional megaspore. This process involves two mitotic divisions: one to form the dyad (two cells) and another to form the tetrad (four cells).
Step 2: Analyzing the options.
(1) One: This is incorrect. One mitotic division is not sufficient to form the full gametophyte.
(2) Two: Correct. Two mitotic divisions are involved in the formation of the female gametophyte.
(3) Three: This is incorrect. The process involves only two mitotic divisions.
(4) Four: Incorrect. Four mitotic divisions do not occur during gametophyte formation.
Step 3: Conclusion.
The correct answer is (2) Two mitotic divisions are involved in the formation of a female gametophyte from a functional megaspore.