how many mitotic divisions are required in microspores in the formation of how many male gametes sufficient for the formation of 100 seeds in angiosperms
Answers
Answer:
200 mitotic divisions are required in microspores In the formation of 200 male gametes and 100 seeds.
Explanation:
Microspore means pollen grain.
1st mitotic division in microspore produces two cells called vegetative cell and generative cell.
2nd mitotic division in generative cell produces two male gametes.
Out of two male gametes,one fuses with secondary nucleus to form endosperm and
Only one fuses with egg to produce zygote, becomes seed containing embryo.
To form 100 seeds, 100 generative cells are required which are ptoduced by 100 mitotic divisions in microspore.
100 male gametes are required to form seed, which produced from mitosis in generative cell.
Total required mitotic divisions are,
100 ( To form 100 generative cell from microspore) + 100 ( To form 200 male gametes out of which 100 forms seed) = 200 mitotic divisions.