The Question is from neet-botany plant-kingdom gymnosperm, and it was created by the author NISHANTH

Question

In gymnosperms, the megaspore mother cell undergoes:

NISHANTH · Accepted Answer

## CORE INFORMATION
✓ **Answer**: C
## CONCEPT FRAMEWORK
 **Primary Concept**: Megasporogenesis in Gymnosperms
 **Related Topics**: Plant reproduction, meiosis, spore formation, female gametophyte development
 **Prerequisites**: Understanding of meiosis and mitosis, basic plant reproductive structures.
## SOLUTION PATHWAY
**Given Information**:
  The question asks about the process undergone by the megaspore mother cell in gymnosperms.
  We need to determine the type of cell division and the number of functional megaspores produced.
**Method & Steps**:
 1. Identify the type of cell division:
  Reasoning: Megaspore mother cells undergo meiosis, a reductional division, to produce haploid megaspores.
  Formula/Rule: Meiosis produces four haploid daughter cells from a single diploid parent cell.
 2. Determine the number of functional megaspores:
  Working:  In gymnosperms, the megaspore mother cell undergoes meiosis to produce four megaspores. However, only one of these megaspores typically survives and develops into the female gametophyte (megagametophyte).
  Key Point: The three other megaspores usually degenerate.
 3. Final step:
  Result: The megaspore mother cell undergoes meiosis to form four megaspores, of which one is functional.
  Verification: This aligns with the typical process of megasporogenesis in gymnosperms.
 ## OPTION ANALYSIS
A :x:  Mitosis does not reduce the chromosome number.  Megaspores need to be haploid.
B :x: Meiosis produces four megaspores, but not all are functional in gymnosperms.
C ✓: Correctly identifies meiosis as the process and states that only one megaspore is functional.
D :x:  Mitosis does not reduce chromosome number, and the number of functional megaspores is incorrect.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing mitosis and meiosis: Remember that meiosis is a reductional division, while mitosis is a duplicative division.
  2.Assuming all megaspores are functional:  Only one typically survives in gymnosperms.
 **Quick Tips**:
  1.Megaspore mother cell -> Meiosis -> Four megaspores (one functional)
  2.Think of it as a survival-of-the-fittest scenario among the megaspores.

NISHANTH · Answer

Mitosis to form two megaspores, both of which are functional.

NISHANTH · Answer

Meiosis to form four megaspores, all of which are functional.

NISHANTH · Answer

The correct Option is "Meiosis to form four megaspores, of which one is functional."

NISHANTH · Answer

Mitosis to form four megaspores, of which three are functional.

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