Question

A woman has blood type A+. Her partner has type A-. She gives birth to a child with type O-. A woman has blood type A+. Her partner has type B+. She gives birth to a child with type O-. What was the chance their child would have type O- blood?

Select one:

a. 1/32 b. 1/16 c. 1/8 d. 1/4 e. 0

What was the chance their child would have type O- blood?

Select one: a. 1/16 b. 1/8 c. 1/4 d. 1/2 e. 0

Answer 1

Women who have blood type A+ ,and her partner was A-

Keeping Rh factor aside for a moment first let us determine possible genotypes of the ABO BLOOD GROUP IN CHILDREN.

Women and man's henotype can be - I^A I^A or I^A I^O ;consider both of them in Heterozygous state

Therefore 1/4 chances are that child will have O blood group and now for Rh Determination :one parent is Rh + and other Rh - ,so there are 50% chances for the child to be each .so net probability =1/4×1/2=1/8.

●Case 2 when partner was B+ and the female was A+ ;in this scenario when both the parents are Rh +,there is 0% chance that the child will be O-ve.