Question

How the endosperm of angiosperm become triploid

Answer 1

Due to Double Fertilization or Triple Fusion...

The male gametes fuse with female gamete and one other PMC...

So..it becomes 3n

Answer 2

Heya..!

endosperm is triploid in nature because is produced by fusion of three haploid nucleus i.e., a male gamete & two polar nuclei

lets see this process in detail...

Double fertilisation is the fusionfusion of two male gametes brought by a pollen tube to two different cells of the same female gametophyte in order to produce two different structures


one male gamete fuses with the egg or oosphere to form a diploid zygote or oospore. This is called GENERATIVE FERTILISATION

the second male gamete descends down and fuses with the two haploid polar nuclei to form a triploid primary endosperm cell. This is called VEGETATIVE FERTILISATION


you might have understood that primary endosperm cell is produced by fusion 3 haploid nuclei...so, the ploidy of primary endosperm cell will be triploid.


this primary endosperm cell divides mitotically to produce endosperm, which will be having a ploidy of 3



(REMEMBER THERE WILL BE NO CHANGE IN PLOIDY IF A CELL DIVIDES MITOTICALLY)



HOPE THIS HELPS YOU.