How many meiotic divisions are required to pr | vedclass

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(B) In angiosperms,one meiotic division produces $4$ microspores (pollen grains) and $1$ functional megaspore (embryo sac).Each seed is formed by the

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$250$ and $500$

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(B) In angiosperms,one meiotic division produces $4$ microspores (pollen grains) and $1$ functional megaspore (embryo sac).Each seed is formed by the fusion of one male gamete and one female gamete.To produce $n$ seeds,$n$ meiotic divisions are required for the male gametes (pollen grains) and $n$ meiotic divisions are required for the female gametes (embryo sacs).Therefore,the total number of meiotic divisions required is $n + n/4$ (since $4$ pollen grains are produced per meiosis,but only $1$ embryo sac is produced per meiosis).However,in standard textbook problems of this type,the calculation is often simplified as $n + n/4$ for the total divisions.For $200$ seeds: $200$ (for megaspores) + $200/4$ (for microspores) = $200 + 50 = 250$ divisions.For $400$ seeds: $400$ (for megaspores) + $400/4$ (for microspores) = $400 + 100 = 500$ divisions.Thus,the correct answer is $250$ and $500$.

Column-$I$	Column-$II$
$(a)$ Zygote	$(1)$ Endosperm
$(b)$ $PEN$	$(2)$ Embryo
$(c)$ Ovule	$(3)$ Fruit
$(d)$ Ovary	$(4)$ Seed

How many meiotic divisions are required to produce $200$ and $400$ seeds in pea plants,respectively?

Similar Questions

Which of the following statements is true?

Rose plants produce large,attractive bisexual flowers but they seldom produce fruits. On the other hand,a tomato plant produces plenty of fruits though it has small flowers. Analyse the reasons for the failure of fruit formation in roses.

Select the correct option for the following statements:
$(i)$ In the embryo sac of angiosperms,the synergids and antipodals degenerate / do not degenerate after fertilization.
$(ii)$ In the leaves of dicotyledonous plants,parallel / reticulate venation is observed.

Match the following columns:

Column-$I$ Column-$II$

$(a)$ Zygote $(1)$ Endosperm

$(b)$ $PEN$ $(2)$ Embryo

$(c)$ Ovule $(3)$ Fruit

$(d)$ Ovary $(4)$ Seed

Which plant flowers once every $12$ years?

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