Question

У матери 2 группа крови, у ребёнка 3. Какая будет у отца? Кто может быть донором?

Answer 1

Скорее всего вторая, но по факту она может быть любая

Answer 2

The blood type of a child is determined by the combination of blood types from the parents. In this case, the mother has blood type 2 (presumably ABO blood type A or B), and the child has blood type 3 (presumably ABO blood type AB).

Since blood type A and blood type B combine to form blood type AB, the child must have inherited one allele from the mother with blood type A and one allele from the mother with blood type B. In other words, the mother is likely heterozygous for blood type alleles (AO and BO).

Now, let's consider the potential blood types of the father. The father could have either:

1. Blood type A (AO) and the child inherited AO from both parents, resulting in blood type A.
2. Blood type B (BO) and the child inherited BO from both parents, resulting in blood type B.
3. Blood type AB (AB) and the child inherited AO from the mother with blood type A and BO from the mother with blood type B, resulting in blood type AB.
4. Blood type O (OO) and the child inherited OO from both parents, resulting in blood type O.

So, based on the information given, the father could have blood type A, B, AB, or O. Without additional information about the father's blood type or family history, we cannot determine the father's blood type definitively.

As for who can be a donor, it depends on the blood type compatibility. The general rule for blood donation compatibility is as follows:

• Blood type A can donate to A and AB recipients.
• Blood type B can donate to B and AB recipients.
• Blood type AB can donate only to AB recipients.
• Blood type O is the universal red blood cell donor and can donate to A, B, AB, and O recipients.

So, if the child's blood type is AB, they are a universal plasma recipient (can receive from any blood type), but the father's blood type would determine which blood types can be potential donors for the child.