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 [tex]\boxed{25}[/tex] Your correct answer would actually be [tex] \frac{1}{4} [/tex]. But by converted it into a percentage, your answer would be 25. [tex]AB[/tex] and [tex]BA[/tex] will both equal [tex] \frac{1}{4} [/tex]. So this would conclude to be that AO = ([tex]Type \ A[/tex]) ; BO = [tex]Type \ B[/tex].
To clarify your answer, your correct answer is [tex]\boxed{25}[/tex]
Hope this helps.
