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Generally speaking, there are A, B, AB, O and of course, there are other rare H types, so there is no need to discuss them.
Assuming the father is type A and the mother is type B, the blood type of the child may be: A or B or Ab
Suppose the father is type A and the mother is type AB, then the child is type A or type AB.
Suppose the father is type B and the mother is type AB, then the child is type A or type AB.
Suppose the father is AB and the mother is AB, then the children must be AB.
Suppose the father is type O and the mother is type A, then the child is type A or O.
Suppose the father is type O and the mother is type B, then the child is type B or O.
Assuming that the father is type O and the mother is type AB, then the child is type O or AB.
Suppose the father is type O and the mother is type O, then the child is type O.
Type AB is a universal recipient (i.e., any blood type can be given to him, and type O is a universal transfusion (i.e., a person of any blood type can be transfused, but only type O can be transfused.
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So genetically, you can only have type A or type B
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There are only four greatest possibilities: type A, type B, type AB, type O.
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There are only two possibilities: type A and type B.
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A or B is only possible in these two ways.
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According to the information given in the question, the following blood group genetic relationship can be obtained:
Mom has blood type A.
The eldest is AB blood type.
The second is blood type O.
According to the law of blood group inheritance, AB blood is formed by the combination of blood type A and blood type B, or blood type AB and AB blood, while blood type O is formed by the combination of blood type A and blood type B or blood type O and blood type O.
Therefore, Dad's Chun Nian blood type can be AB or B. Specifically, if the father has AB blood type, then the eldest will have AB blood type, and the second child will have O blood type; If the father has blood type B, then the eldest will have blood type AB, and the second child will have blood type O.
It should be noted that the answer is based on the conventional blood group inheritance law, but it does not rule out the existence of special circumstances, such as gene mutations, misidentification, etc. Therefore, if a definite conclusion is to be drawn, it is also necessary to carry out relevant genetic testing and other identification methods.
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Mom is type A, the eldest is type AB, the second is type O, may I ask if dad is type B. Blood types are divided into dominant and recessive genes: the mother is the AI type, the father is the bi type, and the child may be A, B, AB, O these four blood types.
You have type A, type B, type AB!
Blood type is genetically determined, and the blood group relationship between parents and offspring depends on genetic factors, such as both parents are type O, the offspring is also type O, the offspring is also type O, the parent is type O or AB, and the offspring is type A or B. The offspring is either type A or type B. Incompatibility between offspring and maternal blood groups can cause neonatal hemolytic disease. >>>More
Gene A and gene B are dominant, and gene I is recessive, your husband's gene is II, and you are AB, so after the combination, it is AI or BI, which is manifested as type A or type B, and there is no other type. >>>More
There is a scientific basis for this matter, AB depends on whether you are negative or positive, if you are positive, then you have a negative child, DIC may occur when you give birth to the second child, that is, diffuse anemia throughout the body, so there are still some dangers, but it generally does not happen when you have the first child.
Their children will not have blood type B. Only type A or AB type.
Father and son cannot be determined, and the child's blood type depends on the blood type of both parents. The relationship between the blood type of the parents and the blood type of the child is: 1. The parents are A and B, and the child should be A or B or AB or O, 2. The parents are all Type A and the child is Type A or O, 3. The parents are all Type B, and the child is Type B or O, 4. The parents are all Type O, and the child is Type O, 5. The parents are all Type A, and the child is Type AB or Type A or Type B, 6. The parents are type A and O, and the child is type A or O, 7. The parents are type B and O, and the child is type B or O, 8. The parents are type B and O, the child is type A or B, 9, the parents are AB and A, the child is AB or A, 10, the parents are AB and B, the child is AB or B, 11, the parents are all AB, and the child is AB or A or B.