You could not explain popularly as 3 group of a blood has turned out, put...

[Natalia]

You could not explain popularly as 3 group of a blood has turned out, a positive rhesus at the child, from parents: at mum 2 +, at the daddy 4. Thanks.

[Olja]

Without ceremony! Maminu the second group genes of joint-stock company or AA, papinu define or determine the fourth - only AV. The child takes on one gene from both and there can be AA (second), OA (second), IN (third) or AV (fourth). In general, any, except for the first. Success to you.