If a couple to be trapped on a desert island with other people how long would it take do you think before mutations started happening In the children that were born on the island during let's say 5 years
Taking into account the island is big enough for about 5 couples and children born. Also there is a good food sorce. Plus they would spend a lot of time in the water.

mutations happen everyday on a genetic/subcellular level

It depends upon how many atomic bomb tests were performed on that island.

During 5 years none unless related! 5 couples so it would be what maybe 3 generation's maybe on forth generation would have mutation's!

But also agree with there are slight mutation's every time !

Yep. If you're not a clone, you're a mutant. Kinda puts things in perspective, if you ask me.

After 5 short years, there would be no discernible "mutations" (no third arms, no cyclops, no webbed feet) assuming that N0 (the parent generation) are not related, have no gene-altering diseases, and are not smoking/drinking during pregnancy. N1 (the first child generation) wouldn't even reach sexual maturity in 5 years, so the whole experiment stops right there.

If we were calling it 5 generations instead of 5 years... That would depend on how much intermingling there was. If each couple produces at least 2 offspring, assuming a 50/50 split in male/female... It would still take a couple generations just to establish a "cousin" relationship, and after that, even with only 5 N0 couples, you could find enough genetic versatility to last 3-4 generations before things started getting weird.

(Is it still "N", or did they change the designation on me when I wasn't looking?)