Question

If pollen grain of plant has 40 pg dna in its nucleous then how much dna would a diploid cell of same orgnism have metaphase 1st

Answer 1

pollen grain has n = 40pg
then diploid cell at metaphase 1 has 4n = 160pg

Answer 2

In metaphase, the diploid cell will have 160 pg DNA

• A pollen grain is a haploid structure, that is, it contains half the number of chromosomes than in a normal cell.
• So, a normal diploid plant cell will have 80 pg DNA as the pollen grain has 40 pg DNA.
• The cell cycle has four stages, which take place in the order G1, S G2, and M phase ( prophase, metaphase, anaphase, telophase, diakinesis).
• In the S phase, the amount of DNA in a cell doubles, so after the S phase, the cell will have 160 pg DNA.

Metaphase comes after the S phase, thus the metaphase of the diploid cell of the plant will have 160pg DNA.