Answer : The correct answer is -
skin cells do not contribute genetic material to sex cells.
Sex cells are the haploid, reproductive cells (also known as gametes, such as sperms and egg) that are produced by parents through gametogenesis (oogenesis in female and spermatogenesis in male).
They are crucial for reproduction in sexually reproducing organisms (like humans) as they fuse together and form a diploid zygote (containing the genetic material of each parent) which develops into fetus.
On the other hand, skin cells are the somatic cells (that are diploid) and do not contribute in the reproductive cycle.
This means that their genetic material is not contributed to the sex cells.
Thus, the frog with genetic mutation in its skin cells will not pass it to the offspring.