A child has blood group O. If the father has blood group A and mother blood group B , work out the genotypes of the parents and the possible genotypes of the other offspring.

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Given;Child has blood group O....Father has blood group A..Mother has blood group B..In order to get child as 'O' blood group ; both the parents need to have 'IO' in their genotypes...Hence;the possible genotype of father having blood group A will be 'IAIO' respectively...And the possible genotype of mother having blood group B will be IBIO respectively...The possible genotypes of offsprings from Father (IAIO) & Mother(IBIO) are...1)IAIB->'AB' blood group..2)IAIO->'A' blood group...3)IBIO->'B' blood group..4)IOIO->'O' blood group...As in question 'O' blood group offspring is already mentioned .So;the possible genotypes of other offsprings are IAIB;IAIO;IBIO respectively....

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Blood group are AB, A, B, and O

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AB, A, B,and O

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A,B,AB,O

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Genotypes of the Parents:
The blood type of an individual is determined by the presence or absence of certain antigens on the surface of red blood cells. There are four main blood types: A, B, AB, and O. Each blood type is determined by the combination of two alleles, one inherited from each parent. The possible genotypes of the parents can be determined based on their blood types.

Father: Blood Group A
Mother: Blood Group B

Blood group A is determined by having the A antigen on the surface of red blood cells, which is controlled by the IA allele. Blood group B is determined by having the B antigen, controlled by the IB allele. Blood group O is determined by not having either antigen, which is controlled by the i allele.

Since the father has blood group A, he can have two possible genotypes: IAIA or IAi. The IAIA genotype means that he has inherited the A antigen from both parents, while the IAi genotype means that he has inherited the A antigen from one parent and the i allele from the other parent.

Similarly, the mother has blood group B, so she can have two possible genotypes: IBIB or IBi. The IBIB genotype means that she has inherited the B antigen from both parents, while the IBi genotype means that she has inherited the B antigen from one parent and the i allele from the other parent.

Possible Genotypes of Other Offspring:
When the father has blood group A (IAIA or IAi) and the mother has blood group B (IBIB or IBi), their offspring can have various blood types depending on the combinations of alleles inherited.

1. Offspring with Blood Group A:
- Genotype: IAIA (inherited from both parents) or IAi (inherited from the father)
- Phenotype: Blood group A (presence of A antigen)

2. Offspring with Blood Group B:
- Genotype: IBIB (inherited from both parents) or IBi (inherited from the mother)
- Phenotype: Blood group B (presence of B antigen)

3. Offspring with Blood Group AB:
- Genotype: IAIB (one allele inherited from each parent)
- Phenotype: Blood group AB (presence of both A and B antigens)

4. Offspring with Blood Group O:
- Genotype: ii (inherited from both parents)
- Phenotype: Blood group O (absence of both A and B antigens)

Therefore, the possible genotypes of the other offspring when the father has blood group A and the mother has blood group B include IAIA, IAi, IBIB, IBi, IAIB, and ii, resulting in blood groups A, B, AB, and O.

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