Question:
Formation of the megaspore from the megaspore mother cell involves a __________.
Formation of the megaspore from the megaspore mother cell involves a __________.
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The megaspore mother cell is diploid and the megaspores are haploid.
Updated On: Nov 12, 2026
- meiosis only
- mitosis only
- mitosis followed by meiosis
- meiosis followed by mitosis
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept
The megaspore mother cell (MMC) in the nucellus is diploid.
Step 2: Formation of megaspores
It undergoes meiosis to form a linear tetrad of four haploid megaspores. No mitosis is needed in this step.
Step 3: Where mitosis comes in
Mitosis occurs later, when the functional megaspore forms the embryo sac.
Final Answer:
Megaspores form from the MMC by meiosis only. \[ \boxed{\text{(A) }\text{meiosis only}} \]
The megaspore mother cell (MMC) in the nucellus is diploid.
Step 2: Formation of megaspores
It undergoes meiosis to form a linear tetrad of four haploid megaspores. No mitosis is needed in this step.
Step 3: Where mitosis comes in
Mitosis occurs later, when the functional megaspore forms the embryo sac.
Final Answer:
Megaspores form from the MMC by meiosis only. \[ \boxed{\text{(A) }\text{meiosis only}} \]
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