KCET · BIOLOGY · STD 12 - 10. Biotechnology and Its Applications
Pollen grains of a plant whose 2n = 28 are cultured to get callus by tissue culture method. What would be the number of chromosomes in the cells of the callus?
- A 14
- B 56
- C 28
- D 21
Answer & Solution
Correct Answer
(A) 14
Step-by-step Solution
Detailed explanation
(A) 14,
When immature pollen grains, which are haploid with (n) chromosomes, are cultured and induced to grow into callus tissue, they maintain their haploid nature. This tissue culture method aims to produce haploid palnt, so the callus will also have (n) chromosomes. For a plant with a diploid number of 28 (2n = 28), the callus derived from haploid pollen will have 14 chromosomes (n = 14).
When immature pollen grains, which are haploid with (n) chromosomes, are cultured and induced to grow into callus tissue, they maintain their haploid nature. This tissue culture method aims to produce haploid palnt, so the callus will also have (n) chromosomes. For a plant with a diploid number of 28 (2n = 28), the callus derived from haploid pollen will have 14 chromosomes (n = 14).
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