dna & identical tiwns

[chergar]

What is the possibility of 2 sets of identical twins producing 2 children with identical dna.

(like if Jane & Joanne "marry" Tom & Tony could they produce "cousins" that were an exact dna match)

[dynamicduo]

In theory yes, in practice no. It would be the similar odds as a couple having two children (through separate pregnancies) and both children being identical.

[wildwood]

No. Identical sibling births have nothing to do with how closely related the parent's family is. Identical twins are the result of an ova splitting in two before it implants itself on the womb wall, thus we have two sets of identical dna each multiplying into a baby.

If by some miracle both Jane & Tom and Joanne & Tony had a set of identical twins only the siblings would be identical, not the cousins. Both sets of twins however would bear some resemblance to each other as would ordinary brothers/sisters because both sets are blood brothers/sisters to each other.

[Peter Pedant]

in theory no and practice no.

the gametes undergo a process called meiosis = where theDNA strands in the father or the DNA strands in the mother cross over

this ensures the children are different

Note in an identical child, each pair of chromosomes is not identical