If the pollen grain nucleus of an angiosperm has 16 chromosomes, what shall be the chromosome number of the zygote and endosperm cell formed on the same plant.

The pollen grain of an angiosperm is haploid. The zygote is diploid and the endosperm is triploid. Therefore, n= 16Zygote (2n)= 16 x 2 = 32Endosperm (3n) = 16 x 3= 48.