Sexual Reproduction in Flowering Plants Question 81
81. A diploid female plant and a tetraploid male plant are crossed. The ploidy of endosperm shall be
(a) tetraploid
(b) triploid
(c) diploid
(d) pentaploid
Show Answer
Answer : a
Hints & Solutions
(a) Diploid female plant will have 2 polar nuclei (each haploid) with which one male gamete form tetraploid male plant (male gamete of tetraploid plant will be diploid) fuses, making endosperm. So endosperm will be tetraploid.
$$ \underset{(2 n)}{\text { Male gamete }}+2 \underset{(n)\qquad (n)}{\text { polar nuclei }} \longrightarrow \underset{(4 n)}{\text { Endosperm }} $$
