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Except, of course, in the example given, the two parents won't share any genetic material (coming from different families originally) and neither will the son a

by mft_ 7y ago

Except, of course, in the example given, the two parents won't share any genetic material (coming from different families originally) and neither will the son and his wife.

baxtr 7y ago
Of course, only if the two parents really are coming from different families originally...