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

How many mitotic divisions are required for development of female gametophyte?

Gamete Formation

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 meiosis and mitotic divisions are needed for the development of 100 female gametophyte in Angiospermic plant?

Hence, to produce 101 female gametophytes in an angiosperm , 101 meiotic division are required.

How many divisions take place in the formation of female gametophyte?

The mature female gametophyte is formed after two mitotic divisions and the process of cellularization of the coenocytic embryo sac (Maheshwari 1950). Its final structure is similar to that of a normal Polygonum-type embryo sac.

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How many mitotic division takes place for complete development of female gametophyte in angiosperms?

The megaspore contains a single nucleus (stage FG1). This nucleus undergoes two rounds of mitosis, producing a four-nucleate coenocyte, with two nuclei at each pole separated by a large central vacuole (stage FG4).

How many meiotic and mitotic divisions are required for the formation of female gametophyte from functional 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 mitotic divisions are required for the formation of 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 meiosis are required for formation of 100 mature female gametophyte in typical angiosperms?

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 are required for the formation of 100 mature embryo sac?

There are three mitotic divisions to form a mature embryo sac from megaspore mother cell.

How many meiotic and mitotic divisions are required for the formation of 100 seeds?

So, for the development of 100 megaspores 100 meiotic division is required. – So, by the fusion of 100 microspores and 100 megaspores, 100 seeds are formed. – Hence for the 100 seed production 200 meiotic division takes place in the Cyperaceae family. Hence, the correct answer is option (D).

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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)