Question

if the ploidy number of endosperm is 9n what will be the ploidy of nucellus​

Answer 1

Answer:

9n ploidy

Explanation:

The nucellus is the central part of the ovule containing the embryo sac and is diploid, and megaspore mother cell is the one which is going to form 4 haploid megaspores by meiosis so again being a parent cell their ploidy is 2n.

Answer 2

Explanation:

6n.

because in the nucellus cells are diploid.

and embryo sac is formed from diploid MMC. Embryo sac contains haploi egg, synergids, antipodal cells,and two haploid cells fuses to formed diploid secondary nucleus.

During fertilization secondary nucleus and one male gamete unite to formed triploid endosperm.

Hence. if cell of nucellus is 6n .

then secondary nucleus is also 6n (3n+3n).

male gamete is haploid hence it is 3n.(Plant is 6n)

Hence 6n+3n = 9n endosperm.

Hence if the ploidy number of endosperm is 9n, then 6n will be the ploidy of nucellus.