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Biology · SEXUAL REPRODUCTION IN FLOWERING PLANTS

हिन्दी

How many mitotic divisions are strictly required for the nucleus of a functional megaspore to develop into a mature 8-nucleate female gametophyte?

  1. One meiotic and three mitotic divisions
  2. Three sequential mitotic nuclear divisions
  3. Seven mitotic divisions
  4. Two sequential mitotic divisions

Correct answer · Option 2

Three sequential mitotic nuclear divisions

Explanation

1 functional megaspore nucleus divides mitotically (1st division) -> 2 nuclei -> (2nd division) -> 4 nuclei -> (3rd division) -> 8 nuclei. Thus, 3 sequential mitotic divisions occur.
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