Question

A plant species has 10 pg DNA and 8 chromosomes in its pollen grain, then what will be the amount of DNA number of chromosomes in its microspore mother cell at G1 phase.

• A. 40pg ; 16 chromosomes
• B. 20pg ; 16 chromosomes
• C. 10pg ; 8 chromosomes
• D. 20pg ; 32 chromosomes

Answer 1

Answer: (B)

20pg ; 16 chromosomes

The pollen grain is the result of meiosis and contains half the number of chromosomes and DNA as it is obtained by its microspore mother cell.

If pollen grain has 10 pg DNA

Microspore mother cell has double the amount= 10x2 = 20 pg DNA

If pollen grain has 8 chromosomes.

Microspore mother cell has double the number= 2x8 = 16 chromosomes.

So the correct option is '20pg ; 16 chromosomes'.