If it s two sisters, isn t it necessarily the same blood type 30?

Not necessarily, depending on what the blood type of the parents is. The blood group system we often talk about is mainly the ABO blood group system, and there are four blood group types, type A, type B, type O, and type AB. Among them, the genotypes of A and B can be homozygous or heterozygous, if the parents' blood type is A and the other is B, both are heterozygous, then the child's blood type can be A, B, O, AB, all of which may occur.

So the two sisters don't have to have the same blood type, but they may also be the same.

Definitely not necessarily, some have the same blood type as their mother, some have the same blood type as their father, some may be the same as their grandmother, or they may be with their grandfather, or their grandfather, their grandmother... It's inexplicable. There is also the possibility of comprehensive, for example, the father is type A, the mother is type B, and the child may be AB and cannot be sure.

If they are identical twins, the blood type must be the same. If not, it depends on the blood type of the parents. If both parents are O, then the two sisters' must be O. If the parents are something else, then maybe it is fingered.

A child's blood type will not be the same unless the parents are of the same type. In fact, if subdivided, there are many subtypes for each blood type. Therefore, only identical twins will have exactly the same blood type.

Not necessarily, if both of your parents are AB, then both of your sisters have the same blood type, and there are a lot of possibilities for the rest.

No. With the exception of identical twins, the blood types of the sisters can be different.

Unless they are identical twins, they may or may not be the same.

It depends on the blood type of the parents, which is not necessarily the same. Blood type has nothing to do with gender.

Not necessarily, the probability of the same is not very large

It should be the same, it is the same if it was born to the same parents.

1. The blood type between siblings and siblings is not necessarily the same, and this quarrel depends on the blood type of the parents. For example, if both parents have blood type O, then the child is also blood type O; If both parents have blood type A and B, then the child may be type A, B, AB, or O. 2. Blood group is a classification based on the difference of homogeneous antigens on the surface of human red blood cells.

Due to the difference in the agglutina contained in human red blood cells, the blood is divided into several types, so it is called the late blood type. There are many types of human blood types, and the one blood group system per liter of cherry blossom is determined by genetic factors and has immunological properties. The most common blood group system is ABO blood group, which is divided into four types: A, B, AB, and O. followed by the Rh blood group system, which is mainly divided into Rh-positive and Rh-negative; The second is the MN and MNS blood group system.

According to the current clinical testing at home and abroad, more than 30 human blood types have been found.

It has to do with your parents' blood type.

A table of common blood group hereditary patterns.

Couples children.

a＋a a、oa＋b a、b、o、aba＋o a、o

a＋ab a、b、ab

b＋b b、ob＋o b、ob＋ab b、a、abo＋o oo＋ab a、bab＋ab a、b、ab

Sisters also have different blood types, and they may have different blood types of their parents. If both parents have blood type O, then the blood type of the sisters must be the same and they are all type O, and in other cases, there is a different blood type relationship.

It's normal for sisters to have different blood types, and it doesn't mean anything. It's tricky to explain. Can you tell me your parents' blood type and give you an answer?

Make sure you are not identical twins.

This generally doesn't mean anything, and the blood type of the sisters can be completely different. For example, if your father is A and your mother is B, then their children will have the following possibilities: A, B, O, AB, so you and your sisters will be different.

The blood type between siblings or siblings will only be the same if both parents have blood type 0, which is the result of the blood group inheritance law table, according to the blood group inheritance law of both parents, the details are as follows:

1. O and O: The blood type and O that the child will have

2. A and O: The blood type, A, and O that the child will appear

3. A and A: The blood type, A, and O that the child will appear

4. A and B, the blood type that the child will appear, A, B, AB, O 5, A and AB: the blood type that the child will appear, A, B, AB 6, B and O: the blood type that the child will appear, B, O

7. B and B: The blood type, B, and O that the child will appear

8. B and AB: The blood type, A, and B that will appear in the child

9. AB and O: The blood type, A, and B that the child will appear

10. AB and AB: The blood type, a, b, and ab that the child will appear

It depends on the blood type of the parents, if the blood type of the parents is O, then the blood type of the child will also be type O, if it is not if both are A or B, then the probability of the children are the same is 50%, if the parents are A and B then the probability of the children is the same is only 25%, if a A and an O, the chance is also 50%.

Even twins have different blood types. Because twins have identical twins and fraternal twins, identical twins look very similar and have the same blood type, while fraternal twins don't look like each other and have different blood types.

This has something to do with the blood type of the parents. It's more complicated to say;

1. Dad (mom) is type A, mom (dad) is type O, and children born to type O may be type A or O.

2. Dad (mom) is type B, and mom (dad) is type O, and children born to type O may be type B or O.

3. Dad (mom) is type O, mom (dad) is type O, and children born to type O are type O.

4. Dad (mom) is type AB, and mom (dad) is type O, and children born to type A or type B may be type A.

5. Dad (mom) is type A, and mom (dad) is type A, and children born to type A may be type A or O.

6. Dad (mom) is type A, mom (dad) is type B, and children born to type B may be type A, type B or O.

7. Dad (mom) is type B, and mom (dad) is type B, and children born to type B may be type B or O.

8. Father (mother) is type AB, and mother (father) is type A, and children born to type A may be type A, type B or type AB.

9. Father (mother) is type AB, and mother (father) is type B, and children born to type B may be type A, type B or type AB.

10. Father (mother) is type AB, and the child born to mother (father) type AB may be type A, type B or type AB.

Are you still satisfied with the answer?

Marriage type The blood type that the child may have The blood type that the child may have.

a b a, b, ab, o none.

a×a a、o ab、b

a×ab a、b、ab o

a×o a、o b、ab

b×b b、o a、ab

b×ab a、b、ab o

b×o b、o a、ab

ab×ab a、b、ab o

ab×o a、b ab、o

o×o o a、b、ab

This is quite normal, blood type is also controlled by genes, and the relationship between blood type and genes can be checked specifically.

One has the same blood type as Mom, and the other has the same blood type as Dad. I'm B

type, sister is o-type. Normal don't worry.