Question

If gametes had the same number of chromosomes as body cells, and an organism had 24 chromosomes in its body cells, how many chromosomes would it have after three generations? How does this illustrate the necessity of meiosis for gamete formation?

Answer 1

Originally the gametes have half the number of chromosomes, thereby during fertilization, two gametes fuse to complement the chromosome number.

But if they have an equal number.

So after first-generation 2 games 24+ 24 = 48

in 2nd genertaion 48+48 = 96

in 3rd generation 96+96 = 192

The meiosis is important to regulate the total number of chromosomes in each generation. If meiosis won't occur the chromosome number won't be regulated and will keep on increasing with each generation.