Question

Assume 2n =12 in a hypothetical species. In gametogenesis, the number of chromosomes in a spermatid would be and in a first polar body would be ____.
A) 3, 6
B) 3, 3
C) 6, 3
D) 6, 6

Answer 1

Hint: Half as many chromosomes are present in haploid sex cells as in diploid somatic cells. If a cell has 12 chromosomes, either the polar body or the spermatid in the cell's gametes has 6 chromosomes.

Complete Step by Step Answer:
The gametogenesis process, which occurs in the testis and ovary of the male and female reproductive organs, respectively, produces sperms and the ovum (polar body).
These are the gametic cells that undergo meiotic division, which results in a halving of the number of chromosomes. that implies that if a somatic (diploid) cell has 12 chromosomes, a gametic cell, which is a haploid cell, has 6 chromosomes.
These gametic cells participate in fertilisation, fuse to form the diploid cell, and then return to the diploid state.
If a cell has 12 chromosomes, either the polar body or the spermatid in the cell's gametes has 6 chromosomes.
So the number of chromosomes would be 6, 6

Hence, option D is the correct answer.

Note: Each gamete, or germ cell, produced by the cell during meiosis has half the number of chromosomes found in somatic or normal cells. The name of this condition is haploidy. The diploid status is reinstated when two germ cells (such as an egg and sperm) combine.