Question

if non disfunction of chromosome 21 is known to occur in division of secondary oocyte in a particular women then what is the chance that a mature egg arising from this cell division will receive 21 chromosomes​

Answer 1

Explanation:

nope, it will receive 22 chromosome, as we have seen 21st chromosome disease, it can be said that even a defected or mutated gene goes through the cell division cycle, as their is no checking mechanism which checks whether their is a defective gene and eliminate it, and we have different chromosome disease like trisomy ,downsyndrome etc..