Question

Variations keep on accumulating during reproduction. And do not disappear in next generation. Give reason

Answer 1

because copying of dna takes place and new progeny will be formed which is similar to the parent

Answer 2

Gene transfers from generations to generations. Every generation carry both traits from the previous generation and new traits. These new traits are basically the variation that appears in this generation.  

Similarly, these differences or variation stays and move on from one generation to another.  

For example: birth of a white child to a beige color parents because the grandfather of the child has white skin color.