3. A physician is examining the blood types of children from a family. o Child 1 has blood type AB, Child 2 has blood type B, Child 3 has blood type B, and Child 4 has blood type A. o Based on the phenotypes of the children, what are the probable genotypes of the parents?
3. A physician is examining the blood types of children from a family. o Child 1 has blood type AB, Child 2 has blood type B, Child 3 has blood type B, and Child 4 has blood type A. o Based on the phenotypes of the children, what are the probable genotypes of the parents?
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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Make a punnett square to determine the genotypes and phenotypes that would result for each scenario.

Transcribed Image Text:**Topic: Genetics and Blood Types**
**3. Analysis of Blood Types in a Family**
A physician is examining the blood types of children from a family.
- **Child 1** has blood type AB
- **Child 2** has blood type B
- **Child 3** has blood type B
- **Child 4** has blood type A
**Question:** Based on the phenotypes of the children, what are the probable genotypes of the parents?
**Discussion:**
- **Blood Types and Genotypes:**
- Blood type A can result from genotypes AA or AO.
- Blood type B can result from genotypes BB or BO.
- Blood type AB results from genotype AB.
- Blood type O results from genotype OO.
**Analysis:**
- Child 1’s blood type AB indicates that one parent must provide an A allele and the other a B allele.
- Children 2 and 3’s blood type B could come from either BO or BB genotypes.
- Child 4’s blood type A could come from either AO or AA genotypes.
From this, we can infer that:
- One parent likely has a genotype with an A allele (either AO or AA).
- The other parent likely has a genotype with a B allele (either BO or BB).
This combination would allow for all observed blood types in the children. Consider working out a Punnett square to visualize the potential allele combinations more clearly.
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