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  4. Calculate the amount of DNA present in a pollen grain and the male gamete that is formed from the pollen mother cell with 20pg of DNA at G1 phase.

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Q. Calculate the amount of $DNA$ present in a pollen grain and the male gamete that is formed from the pollen mother cell with 20pg of $DNA$ at G1 phase.

NTA AbhyasNTA Abhyas 2020

Solution:

G1 phase - $PMC-20pg;$ G2 phase - $PMC-$
$40pg$
Amount of $DNA$ in a pollen grain formed from it $\frac{40}{4}=10pg.$ Male gamete $DNA$ content is equal to pollen grain (unicellular haploid) $DNA$ content $\left(\right.10pg\left.\right)$ .