Can siblings have A and O blood types?

While a child could have the same blood type as one of his/her parents, it doesn’t always happen that way. For example, parents with AB and O blood types can either have children with blood type A or blood type B. These two types are definitely different than parents’ blood types!

Do identical twins have the same blood type?

5 Monozygotic (identical) twins will have the same blood type, with a few very rare exceptions. Dizygotic (fraternal) twins may have the same blood type, or they may have different types. However, twins with the same blood type can be either fraternal or identical.

Which blood groups should not marry?

So Rh +ve man should try to avoid marrying Rh-ve lady. Newborn with erythroblastosis fetalis may need an exchange transfusion. In 1st pregnancy, the problem is less severe but in subsequent pregnancies, a problem becomes more severe.

Are siblings expected to be of same blood group?

As far as this discussion is concerned, the answer is no. Siblings may not have the same blood group. This results in various circumstances such as if both the parents are of type A (for instance), the the offspring will have a type of either A or AB. So, one of the siblings may have a blood type of A and the other with type AB.

Can a family member be a different blood type?

Different people in a family can have different blood types if by random chance they get different genes from a parent- Type A has the A antigen, type B the B antigen, and type O- no antigen. So if you get an A form one parent and a B form another parent – you will be AB

Do brothers and sisters have the same blood type?

Brothers and sisters can have different blood type same way fraternal twins can have different blood types . In fact the whole family can have different blood group, Yes if they are fraternal twins and, although much less common, it is also even possible if they are identical twins.

Does twin always have the same blood type?

Identical twins, on the other hand, will always have the same blood type. Non-identical twins may have different blood groups as long as their parents’ blood type differs. Deoxyribonucleic acid or DNA refers to your genetic composition.