2 meiotic and 1 mitotic.
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 divisions are required for the formation of 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 female gametophyte from functional megaspore respectively?
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 and meiotic divisions are required to form a megaspore?
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 divisions are required for the formation of 100 mature embryo sac?
3 mitotic divisions are required for the formation of mature embryosac.
Is the mother cell of embryo?
A megaspore mother cell is a diploid cell that develops into an embryo sac through two successive processes megasporogenesis and mega gametogenesis. In the first process, there is a one-time meiosis cell division that takes place, and in the second process, there is a three-way mitosis cell division.
What is Monosporic development of embryo sac?
Monosporic embryo sac develops from a single megaspore and as such all the nuclei present in this type of embryo sac are genetically similar. Develops from one of the two dyads formed as a result of the first meiotic division (Meiosis I) of Megaspore Mother Cell.
How many mitotic divisions are needed for 100 cells?
Number of generations (n) of mitosis for producing ‘x’ cells is 2^n. First formula is used when the question is saying “Find the number of mitotic divisions required to produce say 100 cells” so for example, to produce 100 cells, 100-1 = 99 mitosis are required.
How many meiotic divisions are required for the formation of?
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 meiotic divisions are needed for 100 Megaspore?
– The megaspore (ovule) is also developed by the meiotic division. For the development of one megaspore one meiotic division is required. So, for the development of 100 megaspores 100 meiotic division is required.