How many meiotic and mitotic divisions are required for the formation of 10 female gametophyte?
2 meiotic and 2 mitotic.
How many mitotic divisions are needed for female gametophyte?
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 mitotic division takes place for complete development of female gametophyte in angiosperms?
Meiosis in the megaspore mother cell produces four haploid products; one becomes the megaspore. During development, three rounds of mitosis form two clusters of four nuclei at the two ends of the female gametophyte.
How many meiotic and mitotic divisions are required for the formation of embryo sac?
So, there is one meiotic division and 3 mitotic divisions to form an embryo sac. In order to form a microspore tetrad, 1 meiosis is required. Each cell of the tetrad undergoes 2 mitotic divisions to form 2 male gametes.
How many meiotic and mitotic divisions are required for the formation of 100 seeds?
– The microspores (pollen grain) are developed by the meiotic division. For the development of one microspore, one meiotic division is required. So, for the development of 100 microspores 100 meiotic division is required.
How many meiotic and mitotic divisions are required for development of female gametophyte?
The female gametophyte is derived from functional megaspore. Thus to produce 101 female gametophytes, 101 meiosis divisions are required that will occur in 101 megaspore mother cells.
How many mitotic divisions are there?
Mitosis is an equational division where after division each cell produces two daughter cells, therefore after 7 divisions one cell will give 128 cells in case of mitosis.
What is the correct sequence of the formation of female gametophyte in angiosperms?
So, the correct option is ‘Megaspore mother cell (MMC) – Megaspore tetrad megaspore – nucellus – Female gametophyte. ‘
What is the female gametophyte in gymnosperms?
The female gametophyte of gymnosperms is a large and multicellular structure, and serves the double function of bearing the gametes as well as the nourishment of the developing embryo.