If all capable members of this population procreated once, a total of 50 offspring would be produced (the F1 generation).
Contrast this outcome with an asexual species, where each member of the 100-organism population is capable of bearing young.
Technically the problem above is not that of sexual reproduction but a problem of having a subset of organisms incapable of bearing offspring.
Some species avoid the cost of 50% of sexual reproduction, although they have "sex" (in the sense of genetic recombination).For the advantage due to genetic variation, there are three possible reasons this might happen.First, sexual reproduction can combine the effects of two beneficial mutations in the same individual (i.e. Also, the necessary mutations do not have to have occurred one after another in a single line of descendants.This is a consequence of the fact that gametes from sexually reproducing species are haploid.
Again however, this is not applicable to all sexual organisms.
In these species (e.g., bacteria, ciliates, dinoflagellates and diatoms), "sex" and reproduction occurs separately.