Person1234 said:

^Things to ponder.

Such as:

If you go back in time to have sex with yourself, is it sex or masturbation?

If you get a sex change, go back in time, and produce a child with your old self, is the child a perfect clone of

you? Ahhhg too many words cant keep up FFFFUUUUUUUUUUUU

bugmenot said:

Doubtful it'd be perfect clone, as there's recombination across the chromosomes in a pair, as a well as the pairs themselves splitting off rather randomly when the diploid cells split off into haploid cells, making it nigh-impossible to find a pair of gametes that have exactly the opposite halves of one's DNA.

Even then, if the mix of genes is the same, it may express the genes differently, depending on which ones are methylated or not.