Question

If stem has $2 n=10$ number of chromosomes then find out
$A$ - number of chromosome in endosperm.
$B$ - number of chromosome in egg cell.
$C$ - number of chromosome in polar nuclei, respectively.

• A. 15,15,20
• B. 10,15,20
• C. 15,5, 10
• D. 10,5, 15

Answer 1

Answer: (C)

If stem has $2 n=10$ number of chromosomes, then
Endosperm $=3 n=5 \times 3=15$ chromosomes.
Egg cell $=1 n=1 \times 5=5$ chromosomes.
Polar nuclei $=2 n=2 \times 5=10$ chromosomes.