9Why is the occurrence of mutations in meiosis often more detrimental to an organism than the occurrence of m

Answer 1

I'm going to guess here that the rest of your question is supposed to read "...occurrence of mutations in mitosis?". (You should check your question after posting- you might get more answers!)

If a mutation happens in mitosis, that mutation is only present in those cells that divided. This could be a whole organism, if it's one-celled, but if it's in, say, a human, all you might have is 2 cells with that mutation.

If the mutation happens in meiosis (creation of gametes), and that gamete is fertilized, IF produces a viable offspring, ALL cells in the offspring will have the mutation.

Answer 2

that guy pretty much as it. i don't know how lethal an error in neurospa meiosis I or II is, but i dont think you are really concerned with anything beyond the grade school answer.
think of it like a photocopy machine: if an error occurs on the first page, it will be on every page made after that.