A plant species has 10 pg DNA and 8 chromosomes in its pollen grain, then what was the amount of DNA and number of chromosomes in its microspore mother cell at G1 phase
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a
40 pg; 16 chromosomes
b
20 pg; 16 chromosomes
c
10 pg; 8 chromosomes
d
20 pg; 32 chromosomes
answer is B.
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Detailed Solution
Pollen grain is haploid. If there 10Pg of DNA (c) and 8 chromosomes (n) in the pollen grain then the amount of DNA (2c) in microspore mother cell in G1 phase will be 20pg and the number of chromosomes will be 2n= 8x2=16 chromosomes.