Biology 2010 Student Edition

Published by Prentice Hall
ISBN 10: 9780133669510
ISBN 13: 978-0-13366-951-0

Chapter 14, Human Heredity - Standardized Test Prep - Page 415: 3



Work Step by Step

There is no chance that the child can turn out to have $B^{-}$ blood. In this question, the woman can only contribute an $A^{-}$ allele whereas the man can contribute an $A^{-}$ or a $B^{-}$ allele. If the child gets an $A^{-}$ allele from the mother and an $A^{-}$ allele from the father, the child will have $A^{-}$ blood. If the child receives an $A^{-}$ allele from the mom and a $B^{-}$ allele from the father, the child will have $AB^{-}$ blood. Only if each parent is able to contribute a $B^{-}$ allele or if one parent has an $O^{-}$ allele can the child have $B^{-}$ blood.
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