Best answer: How many mitotic divisions are required for the formation of female gametophyte?

How many meiotic and mitotic divisions are required for the formation of female gametophyte?

Thus, one meiotic division produces one matured female gametophyte in an angiosperm. Hence, 101 meiotic divisions are required to produce 101 female gametophytes in an angiosperm.

How many mitotic divisions take place during female gametophyte?

For female gametophyte development, only one functional megaspore out of the four megaspores survives, and it undergoes three rounds of mitotic divisions and subsequent cellularizations to produce a seven-celled mature embryo sac, also termed the female gametophyte (Yang and Sundaresan, 2000; Drews and Yadegari, 2002).

How many meiotic divisions are required for the formation of female gametophyte?

The megaspore mother cell produces four haploid megaspores in which three degenerate and only one matures to form the functional female gametophyte. Hence, to produce 101 female gametophytes in an angiosperm , 101 meiotic division are required.

How many mitosis are in the female gametophyte?

Gamete Formation

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From the remaining functional megaspore, the megagametophyte (also known as female gametophyte or embryo sac) develops by three mitotic divisions, at the mature stage consisting of 8 nuclei and 7 cells (one egg cell, two synergids, one central cell and three antipodals).

How many meiotic and mitotic divisions are required for the formation of mature male gametophyte?

Hence, one meiotic division and two mitotic division are required for the formation of fully mature male gametophyte from microspore mother cell in angiosperm.

How many meiotic and mitotic division produce a female gametophyte from megaspore?

The female gametophyte, also known as embryo sac, develops within the ovule [1,2]. A region called the nucellus gives rise to a single pre-meiotic cell—the megaspore mother cell (MMC). MMC undergoes two meiotic divisions resulting in four haploid megaspores.

How many cells are formed in a mature female gametophyte?

There are usually 8 haploid cells in the female gametophyte of a flowering plant: 3 antipodal cells (at the opposite end of the embryo sac from the egg)

How many meiotic divisions are required to produce?

Hint: To produce 100 male gametes, 25 meiotic divisions are done, and to produce 100 female gametes, 100 meiotic divisions are done. Hence the total divisions which are essential in humans for the formation of 100 zygotes.

How many meiotic divisions are required?

Each microspore mother cell or pollen mother cell (PMC) on reduction division (meiosis) gives rise to 4 pollen grains. Hence, to form 100 pollen grains, 25 meiotic divisions are required.

How many mitotic divisions are required for the formation of male gametes?

The formation of the male gamete requires only one meiotic division which results in four male gametes while the formation of four female gametes requires four meiotic divisions.

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