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Meiotic Division for Producing 102 Pollen Grains

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Explanation:

- In order to produce 102 pollen grains, multiple meiotic divisions are required in the process of microsporogenesis.

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Meiosis I:

- Meiosis I is the first division in which a diploid cell undergoes homologous chromosome pairing, crossing over, and segregation to produce two haploid cells.

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Meiosis II:

- Meiosis II is the second division in which the two haploid cells resulting from Meiosis I further divide to produce a total of four haploid cells.

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Pollen Grain Formation:

- Each haploid cell produced after meiosis will further differentiate and develop into a pollen grain.

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Calculation:

- Since each meiotic division results in a doubling of the number of cells, the number of divisions required to produce 102 pollen grains can be calculated as follows:

- 1st division: 2 cells
- 2nd division: 4 cells
- 3rd division: 8 cells
- 4th division: 16 cells
- 5th division: 32 cells
- 6th division: 64 cells
- 7th division: 128 cells (which exceeds the required number)

- Therefore, a total of 6 meiotic divisions are required to produce 102 pollen grains.

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Conclusion:

- Through the process of meiosis, multiple divisions are necessary to generate the required number of pollen grains for plant reproduction. Each division results in an increase in the number of cells, ultimately leading to the production of 102 pollen grains.