In theory, if you have enough kids, would they start genetically repeating?

Question

If you get 50% of dna from each parent, and there’s a finite amount of dna in each one, in theory, if you had enough kids (an impossibly large quantity) would your kids eventually be genetically identical to previous kids? Would the possible number of dna combination end eventually?

In: 20

Answer 1

There’s an incredibly varied but ultimately finite number of ways that meiosis can go to produce sperm/eggs in either parent, so it’s possible (in the absolute most theoretical sense) to produce one that is identical to a previous one.

If you manage to do that in both parents *and* then bring these two together as well, you could end up with a child that is identical to a previous one.

But in reality, this is never ever ever going to happen.