Question

If female plant is tetraploid and male plant is hexaploid then what will be the ploidy of endosperm, vegetative cell and embryo respectively:- (1) 7x, 2x, 5x (2) 7x, 3x, 5x (3) 5x, 3x, 4x

Answer 1

Answer:

(2) 7x, 2x, 5x........

Female plant is tetraploid so female gamete and polar nuclei in ovule are diploid.

Male plant is hexaploid so male gametes are tetraploid.

endosperm (3n)-triploid normally:

2 polar nuclei(2x) + 1 male gamete(3n) = 2×2x + 3x = 7x.

Vegetative cell (n) -haploid normally:

From pollen grain - 3x.

Embryo (2n) diploid normally:

1female gamete (2x) +1 male gamete(3n) = 5x.