Father's blood type

The blood type of a child is determined not only by the blood type of the father, but also by the blood type of the mother. According to the genetic law of human blood type, if the father is type O blood, the blood type of the child depends on the blood type of the mother, and there are the following situations:

1. If the father is type O and the mother is type A, is the child's blood type A or O? ..

2. If the father is blood type O and the mother is blood type B, then the blood type of the child is blood type B or O. ..

3. If the father is blood type O and the mother is blood type O, then the blood type of the child is blood type O. ..

4. If the father is blood type O and the mother is blood type AB, is the child's blood type A or B? ..

Extended data:

The most common blood group system is ABO blood group, which is divided into four types: A, B, AB and O; Followed by Rh blood group system, mainly divided into Rh positive and Rh negative; Secondly, there are some rarer blood type systems, but people with this blood type are extremely rare.

Blood type is determined by genes on chromosomes. Human cells have 23 pairs of chromosomes, half from their fathers and the other half from their mothers. These chromosomes carry thousands of genes from both parents and are passed down from generation to generation. ABO blood group is determined by three blood group genes, A, B and O, and the blood group genes are located in the ninth pair of two chromosomes.

Because A and B are dominant genes and O is recessive gene, the ninth chromosome shows type A blood as long as there is a gene, regardless of whether the corresponding locus of another chromosome is A and O genes.

Blood type O must be the ninth pair, and both chromosomes are O genes. If one chromosome in the ninth pair carries the A gene and the other carries the B gene, AB blood will appear.

According to this truth, if a couple's husband is type A and the woman is type O, then their children may have a combination of two blood types, that is, 3/4 people are type A blood and the other half is type O blood. So a child's blood type can be different from that of his mother or father.

References:

Baidu Encyclopedia-Blood Group Genetic Rules Table