In order to determine the number of meiosis and mitosis required for the formation of 400 male gametes in Cyperus, it is important to understand the process of meiosis and mitosis and their roles in gamete formation.


Meiosis is a specialized cell division process that occurs in reproductive cells, resulting in the formation of gametes. It involves two successive divisions, known as meiosis I and meiosis II. Here's how meiosis contributes to the formation of male gametes:

1. Meiosis I:
During meiosis I, a diploid cell undergoes replication of DNA, followed by two successive divisions. This process starts with the pairing of homologous chromosomes, forming tetrads. Crossing over occurs, leading to genetic recombination. The result is two haploid cells with duplicated chromosomes.

2. Meiosis II:
Meiosis II is similar to mitosis, but with half the number of chromosomes. The two haploid cells produced during meiosis I undergo further division, resulting in the formation of four haploid cells known as gametes.


Mitosis is a cellular division process that occurs in somatic cells, leading to the growth, repair, and maintenance of the body. Unlike meiosis, mitosis does not contribute directly to the formation of gametes.


To determine the number of meiosis and mitosis required for the formation of 400 male gametes in Cyperus, we need to consider the following:

1. Each round of meiosis results in the formation of four gametes.
2. Cyperus is a diploid organism, meaning it has two sets of chromosomes.
3. Male gametes are haploid, containing only one set of chromosomes.

Given these factors, we can calculate the number of meiotic divisions required:

400 male gametes ÷ 4 gametes per meiosis = 100 meiotic divisions

Since each meiotic division consists of both meiosis I and meiosis II, we need to multiply the number of meiotic divisions by 2:

100 meiotic divisions × 2 = 200 total meiotic divisions

Therefore, 200 rounds of meiosis are required to produce 400 male gametes in Cyperus.

Note: Mitosis does not directly contribute to the formation of gametes in Cyperus. It primarily occurs in somatic cells, ensuring the growth and maintenance of the plant body.