21. The endosperm cell of an angiosperm has 24 chromosomes, the number of chromosomes in its megaspore, shall be a.24 b.16 c.48 d.18
As the chromosome number is 24, the chromosome number in the pollen grain will be 12 after reduction division. As the endosperm in angiosperm is formed due to fertilisation of diploid secondary nucleus of embryo-sac and one male gamete, the chromosome number will be 36.
