Male gamete of a plant has 20pg DNA. What would be the amount of DNA in the meiocyte of the same plant as its G2 phase of the cell cycle?

Question

Male gamete of a plant has 20pg DNA. What would be the amount of DNA in the meiocyte of the same plant as its G2 phase of the cell cycle? (A) 20pg (B) 60pg (C) 10pg (D) 80pg

Tardigrade Admin · Accepted Answer

Gametes are produced by meiosis, so they are haploid and carry carry half number of chromosomes (or DNA content ) as that of parent cell.
A cell in which meiosis takes place, is called meiocytes which are diploid and carry twice number of chromosomes (or DNA content) as that of gametic cell.
If male gamete of a plant carries 20pg DNA, it is its haploid content.
Its meiocyte is diploid, so it contains 20 x 2 = 40 pg of DNA.
G₂ phase is phase of interphase which takes place after S-phase or Synthesis phase.
In S-phase DNA content of a cell is duplicated so in G₂ phase DNA content is 40 x 2 = 80 pg.

Q. Male gamete of a plant has $20 p g$ DNA. What would be the amount of DNA in the meiocyte of the same plant as its $G_{2}$ phase of the cell cycle?

$20 p g$

$60 p g$

$10 p g$

$80 p g$

Q. Male gamete of a plant has 20pg DNA. What would be the amount of DNA in the meiocyte of the same plant as its G2​ phase of the cell cycle?

20pg

60pg

10pg

80pg

Q. Male gamete of a plant has $20 p g$ DNA. What would be the amount of DNA in the meiocyte of the same plant as its $G_{2}$ phase of the cell cycle?

$20 p g$

$60 p g$

$10 p g$

$80 p g$