Quote Originally Posted by Kryptonian View Post
Wouldnt that be best case scenario? I think it would be possible that sibs could share 100% of the same genes depending on which ones they inherit from the parents.Twins for example.
Sibs could, theoretically, share 100% of the same genes but statistically speaking (which makes sense since we are on the order of millions/billions of DNA base pairs) each sib shares 50% of its genes with other sibs.

Twins are indeed a counterexample.

JonV