Question

A man heterozygous for blood type A marries a woman heterozygous for blood type B. The chance that their first child will have type O blood is ____.  

a. 75%
b. 50%
c. 25%
d. 0%

Answer 1

Hey there Ruth,

A man heterozygous for blood type A marries a woman heterozygous for blood type B. The chance that their first child will have type O blood is
`\boxed{25}` Your correct answer would actually be
`(1)/(4)`. But by converted it into a percentage, your answer would be 25.
`AB` and
`BA` will both equal
`(1)/(4)`. So this would conclude to be that AO = (
`Type \ A`) ; BO =
`Type \ B`.

To clarify your answer, your correct answer is
`\boxed{25}`

Hope this helps.