16th of March 2017

what are omosomes? expalin how in sexually reproducing organism the number of chromosomes in the progeny is maintained ?

Sne Ha - CBSE - Class X

Thursday, March 16, 2017 at 11:35:AM


Hi Sneha,

chromosome is a DNA molecule with part or all of the genetic material (genome) of an organism. 

In sexually reproducing organisms, the gamete formation involves meiosis that reduces the number of chromosomes to half. But the chromosome number gets doubled again after the fertilisation of gametes to form zygote. In this way, chromosome number is maintained in sexually reproducing organisms.

Thursday, March 16, 2017 at 17:37:PM