Question

10. Find out the chromosome number of root cells and pollengrains respectively in a plant having
and centripetal
chromosome in its stem cells
1) 18 and 36
3) 18 and 27
2) 9 and 27
4) 18 and 9​

Answer 1

Answer:

I think the answer is 3) 18-27

Answer 2

There will be 18 chromosomes in a root cell and 9 chromosomes in a pollen grain in the plant

• In a plant, the root cell is a diploid cell, that is, it contains 2n number of chromosomes.
• A pollen grain is a reproductive structure that is a part of the male reproductive system of a plant.
• The ploidy of a pollen grain in n, that is, it is a haploid structure and contains half the number of chromosomes than in a normal cell.
• In the given options Option 4 gives the chromosome number which satisfies this condition.

Thus, the correct option is  (Option 4) where the chromosome number of the root cell will be 18 (2n) and the chromosome number of the pollen grain will be 9 (n).