Question

A woman with blood type O has a child with blood type B. She accuses a man with blood type A of being the father of her child.

1. What is the woman’s (mother’s) blood genotype?

2. What is her child’s blood genotype?

3. What is the chance that this man is the father of her child? (Show in the following punnett square)

4. What must the man’s blood genotype be if he is the father?

Answer 1

Answer:

1). Woman’s blood genotype = IOIO

2). Child’s blood genotype = IBIO

3).

Type O blood genotype = IOIO

Type B Blood genotype = IBIB or IBIO

Type A blood genotype = IAIA or IAIO

Type AB blood genotype = IAIB

Woman (IOIO) x (IAIO) Father---Parents

	IA	IO
IO	IAIO (A type)	IOIO (O type)

There is not possibility of type B child. So that the man with A blood type would not be the father of the child.

4). The man’s genotype must be either B type or AB type to be the father of the child with B type.