Question

If $6N$ female plant is crossed with a $4N$ male plants then the ploidy level of endosperm cell would be:

• A. $3N$
• B. $9N$
• C. $10N$
• D. $8N$

Answer 1

The correct option is D $8N$

Endosperm is formed by the fusion of polar nuclei and male gamete.
so, if the ploidy level of female plant is 6N
female gamete = 3N
ploidy level of male plant is 4N
male gamete = 2N
endosperm = 2 polar nuclei + 1 male gamete
= (3N + 3N) + 2N
= 8N