A man who has type O blood has a child with a woman who has type A blood. The woman's mother has type AB blood and her father, type B. What is the probability that the child has type A blood? O 0% O 75% O 100% O 50% O 25%
A man who has type O blood has a child with a woman who has type A blood. The woman's mother has type AB blood and her father, type B. What is the probability that the child has type A blood? O 0% O 75% O 100% O 50% O 25%
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:**Genetics Problem: Blood Type Probability**
_Problem Statement:_
A man who has type O blood has a child with a woman who has type A blood. The woman’s mother has type AB blood and her father, type B. What is the probability that the child has type A blood?
- 0%
- 75%
- 100%
- 50%
- 25%
_Explanation:_
1. **Blood Type Basics:**
- Blood type is determined by the combination of alleles inherited from the parents.
- Type O contains two O alleles.
- Type A can have either AA or AO alleles.
- Type B can have either BB or BO alleles.
- Type AB has one A allele and one B allele.
2. **Parental Blood Types:**
- Man (Type O): OO alleles
- Woman (Type A, with AB mother and B father): She must have inherited one A allele from her AB mother and one B or O allele from her B father. Since she has type A blood, her genotype must be AO.
3. **Punnett Square Analysis:**
- To determine the child's blood type probability, we need to analyze the combination of the father's OO alleles and the mother's AO alleles.
- The possible allele combinations for the child are:
- O from the father and A from the mother: AO (Type A blood).
- O from the father and O from the mother: OO (Type O blood).
- Thus, there are two possible outcomes for the child’s blood type: AO (Type A) and OO (Type O).
4. **Probability Calculation:**
- Since the likelihood of getting AO or OO is equally probable, each outcome has a probability of 50%.
_Conclusion:_
The probability that the child has type A blood is 50%.
_Answer:_ 50%
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