In the family home, two children were confused. The first pair of parents has 1 and 2 blood groups

In the family home, two children were confused. The first pair of parents has 1 and 2 blood groups, the second pair has 1 and 4. One child has group 2, and the second has 1 group. Identify the parents of both children.

The blood group is inherited according to the type of multiple allelism. Let’s designate genes as A, B, O.

The first pair of parents: Group I (OO) and Group II (AO).

P: OO x AO

G: O x A, O

F: OO – I blood group

AO – II blood group

The second pair of parents: Group I (OO) and Group IV (AB).

R: OO x AB

G: O x A, B

F: AO – II blood group

BО – III blood group

Conclusion: the first couple can have children with I and II groups, the second couple – with II and III. Consequently, a child with group I belongs to the first pair, with group II – the second.