The mother has a second blood group, the father is also the second. what blood types can be expected in children.

| January 28, 2021 | education

A person with blood of the second group may have one genotype of two possible variants – either IA I0 or IA IA.

Since in this problem both parents have blood group II, 3 possible options should be considered.

Let both parents have the same genotype – IA IA. Then both of them produce germ cells of the same type – IA. All their offspring will be uniform and similar to their parents: children will have blood group II and genotype IA IA;

Let both parents have the same genotype IA I0. Both of them will produce two types of germ cells – IA and I0. The offspring will be represented by the following options: children with blood group II (IA IA) – 25%; children with blood group II (IA I0) – 50%; children with blood group I (I0 I0) – 25%;

Let one of the parents have the IA IA genotype and form the IA gametes, and the second has the IA I0 genotype and produce the IA and I0 gametes. The offspring will include options: children with blood group II (IA IA) – 50%; children with blood group II (IA I0) – 50%.



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