Question

why do varations keep on accumulating during reproduction and do not disappear in next generation

Answer 1

due to gene ...it is in dna and rna ...
during reproduction genes pass through parents to their child ...the new changes r variation but is accumulated only .....

Answer 2

well when the male gamete and female gamete fuses to form zygote
23 and 33 chromosomes combines to form 46 chromosome which carry both the character of man and women the chromosome perform meiosis where the chromosomes does overlapping and overlapping changes owr characters