Hello! I am am excited with a following question: At mother the first group of a blood...

[Evgenie]

Hello!
I am am excited with a following question:
At mother the first group of a blood, positive
At the father the second group of a blood, positive
At the child the first has turned out, NEGATIVE.
It is real? Or something not so?
Many thanks

[Kuznetsova E.A.]

Quite really, all so.