Why during the cell division dna doubles but chromosome no. Remains te same?
Answers
In sexual reproduction thoughgenetic material DNA in the form of chromosome from to gametes male and female gametes combine two way to form a new cell zygote but the amount of DNA in zygote does not get double this can be explained as follows the gametes arev a special type of cell called reproductive cells is contain only half amount of DNA or half the number of chromosome as compared to the normal body cells of an organism so when a female gamete combine with a male gamete during sexual reproduction then the zygote will have the Normal amount of DNA for example the human sperm has 23 chromosomes and human egg has also 23 chromosomes so when a sperm and eggs used together during fertilization is zygote form will have 23 + Y is equals to 46 chromosomes in a normal number of chromosomes