Question

1. blood type analysis is used frequently as evidence in paternity suits. consider the following hypothetical cases presented in the table. the blood type of the mother and child are given; indicate which blood type(s) must be the fathers for each situation. mother a b o b a child b b o ab o fathers blood type(s) (a, b, ab or o)

Explanation:

Step1: Recall blood - type inheritance rules

Blood types are determined by alleles. A and B are co - dominant, and O is recessive.

Step2: Analyze first case (Mother A, Child B)

Since the child has B, and the mother is A, the father must have a B allele. So the father can be B or AB.

Step3: Analyze second case (Mother B, Child B)

The father can be A, B, AB, or O as long as certain allele combinations are met. But to be sure to contribute to the child's B, B or AB are more likely, but all are possible.

Step4: Analyze third case (Mother O, Child O)

The father must have an O allele. So the father can be A (if heterozygous AO), B (if heterozygous BO), or O.

Step5: Analyze fourth case (Mother B, Child AB)

The father must have an A allele. So the father can be A or AB.

Step6: Analyze fifth case (Mother A, Child O)

The father must have an O allele. So the father can be A (if heterozygous AO), B (if heterozygous BO), or O.

Answer:

1. B, AB
2. A, B, AB, O
3. A, B, O
4. A, AB
5. A, B, O