Question about genetic identification

[CaptainNuevo]

If there are 2 pairs of identical twins, and they get married (so Male A/Female A is one couple, MaleB/FemaleB is the other), and both have children, could you genetically tell which set of parents the child comes from?

What if one of them were unfaithful at one point, could you tell if MaleA were the father of both kids?

 

[Evolved1]

Their DNA is only identical at birth.

 

[CaptainNuevo]

Their DNA is only identical at birth.

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Wait your DNA changes as you live your life?

 

[SteveWinwood]

paternity tests are pretty basic and not great. they really only test a few markers so with that the answer would be almost certainly no

if you had the time and money you could sequence the kid and the two twins and in theory tell which one was the father yes

the twins are identical when they split but it doesnt take long for changes to start occuring and it only takes a few changes in the germ line (your sperm or ova dna) to be passed on and you could use those to identify

 

[SteveWinwood]

Wait your DNA changes as you live your life?

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yes your dna mutates all the time, even if not exposed to mutagens. there are just errors in the replication process

and thats before we even get to methylation changes which is a whole other thing

 

[Evolved1]

Wait your DNA changes as you live your life?

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Yes, there are all sorts of factors. From random mutation to different environmental factors... actually they are even different at birth, because changes are occurring from the moment they split.

 

[wandering]

Wait your DNA changes as you live your life?

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Yup; there's always a chance for replication errors when producing new cells, or errors when repairing naturally-occurring DNA damage. It's the driving force behind aging, mutations, cancer, etc.

 

[Dongs Macabre]

I hope you find out who the father is