¥¥During microsporogenesis we know that a microspore tetrad is formed. Therefore after one meiotic division, we know that 4 are formed. Therefore to produce 200 gametes,

200/4 meiotic divisions to occur


There's a particular formula, n+n/4 where n is the number of gametes to be formed.

Therefore the number of meiotic divisions is 200+200/4= 200+50= 250.

•Hence 250 meiotic divisions are required to form 200 male gametes

Meiotic Divisions in Capsella:

In order to understand the number of meiotic divisions required for the formation of 200 male gametes in Capsella, we need to consider the process of meiosis and the characteristics of Capsella reproduction.

Meiosis:
Meiosis is a specialized type of cell division that occurs in sexually reproducing organisms to produce gametes (sex cells) with half the number of chromosomes as compared to the parent cell. It consists of two successive divisions, namely meiosis I and meiosis II, which result in the formation of four haploid daughter cells.

Capsella Reproduction:
Capsella, also known as shepherd's purse, is a flowering plant that exhibits sexual reproduction. It has a diploid chromosome number of 2n=16, which means it has 16 chromosomes in each somatic cell.

Formation of Male Gametes:
Male gametes, also known as pollen grains, are formed through the process of meiosis in the anthers of the flower. Each anther contains microsporangia, which undergo meiosis to produce microspores. These microspores then undergo further development to form pollen grains.

Calculating the Number of Meiotic Divisions:
To determine the number of meiotic divisions required for the formation of 200 male gametes in Capsella, we need to consider the following points:

1. Each meiotic division results in the formation of four haploid daughter cells.
2. Each haploid daughter cell has half the number of chromosomes as compared to the parent cell.

Given that Capsella has a diploid chromosome number of 2n=16, each meiotic division will result in the formation of four haploid daughter cells with n=8 chromosomes.

To calculate the number of meiotic divisions required:
1. Divide the desired number of male gametes (200) by the number of haploid daughter cells formed in each meiotic division (4).
- 200 / 4 = 50
2. Each meiotic division results in the formation of four haploid daughter cells, so we need to multiply the result from step 1 by four.
- 50 * 4 = 200

Therefore, in Capsella, 200 male gametes can be formed through 50 meiotic divisions.

Conclusion:
In conclusion, the number of meiotic divisions required for the formation of 200 male gametes in Capsella is 50. Each meiotic division results in the formation of four haploid daughter cells, and given the diploid chromosome number of Capsella, this allows for the production of 200 male gametes with half the number of chromosomes as compared to the parent cell.