Question

How many pollen mother cells should undergo reduction division to produce 80 pollen grains

Answer 1

Answer:

The number of pollen mother cells needed to undergo reduction divisions to produce 80 pollen grains is 20.                                                                      

Explanation:

• As we know, Meiosis is a specialized type of cell division which reduces the chromosome number by half.

• During meiosis, DNA replication occurs followed by two rounds of cell division to produce four daughter cells with half the number of chromosomes(n) as the original parent cell.

• The two meiotic divisions are namely meiosis I and meiosis II. Meiosis occurs in germ cells and not in vegetative(somatic) cells.

• A single pollen mother cell (PMC) or microspore mother cell undergoes meiosis or reduction division to form 4 haploid pollen grains or microspores (male gametes).

• Since each division yields 4 male gametes from each mother cell, thus for producing 80 Pollen grains, PMCs will undergo 80/4 meiotic divisions.

Therefore 20 pollen mother cells are needed to produce 80 male gametes.

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Answer 2

Answer:

20

Explanation:

A single pollen mother cell(PMC) gives rise to a group of four haploid microspores through a meiotic division or we can say that A tetrad haploid microspores are formed from one pollen mother cell during the meiotic division.

Accordingly, 20 pollen mother cells undergo meiotic divisions to produce 80 pollen grains.

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