If a tetraploid plant contains 48 chromosomes | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The nucellus is a diploid $(2n)$ tissue in the ovule,but in a tetraploid plant,the somatic cells are $4n$. Given that the tetraploid plant has $4n

Vedclass · Accepted Answer

$24$ and $24$

Vedclass · Answer

(B) The nucellus is a diploid $(2n)$ tissue in the ovule,but in a tetraploid plant,the somatic cells are $4n$. Given that the tetraploid plant has $4n = 48$ chromosomes in its nucellus,the haploid number $(n)$ is $48 / 4 = 12$. The egg cell and synergids are part of the embryo sac (gametophyte) and are haploid $(n)$. Therefore,the number of chromosomes in the egg cell is $n = 12$ and in a synergid is $n = 12$. Wait,re-evaluating the ploidy: If the plant is tetraploid $(4n)$,the gametes produced by meiosis are diploid $(2n)$. Thus,$4n = 48$,so $2n = 24$. Both the egg cell and synergids are haploid relative to the sporophyte,but since the sporophyte is $4n$,the gametophyte cells are $2n$. Therefore,both the egg cell and the synergid contain $24$ chromosomes.

If a tetraploid plant contains $48$ chromosomes in its nucellus,then what is the number of chromosomes in the egg cell and in a synergid,respectively?

Similar Questions

What is the small opening at the apex of the megasporangium,which is not covered by the integuments,called?

Which stage does the egg cell represent?

What is meant by monosporic development of the female gametophyte?

What is an ovule called when it is arranged transversely?

The body of the ovule is fused with the funicle at:

Vedclass Test Series

Exam Paper Generator

Online Exam Module