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. Male gamete +2 polar nuclei $\longrightarrow$ Endosperm (2n) (n) (n) $(4 n)$
