Question

If both the strands copied during transcription then what will happen

Answer 1

its not possible ....as 50% parental and 50% new charaters are in new generation

if its happen than variation waill not take place in new generation

Answer 2

If that happens then chromosome number of that species will double and the species will not be able to maintain a constant chromosome number which means the species itself will change phenotypically and genotypically