Problem 1: Co-dominance
A. If a woman has blood type A and her child has blood type B, could the biological father of the child have blood type O? Explain.
B. If a woman has blood type A and her child has blood type B, is she homozygous for the A allele (AA) or heterozygous (AO)? Explain.
Problem 2: Pedigree Analysis
Use this pedigree for the following questions. The inheritance for this trait is autosomal, not sex-linked.
A. Who in this family must be homozygous?
B. Who in this family must be heterozygous?
C. If this were X-linked inheritance (note you do not know if the trait is associated with recessive or dominant inheritance)
Is it possible that "M" is homozygous recessive, given this pedigree?
Problem 3: Pedigree Analysis
Use the following pedigree for this question:
Given this pedigree and the additional information that I-1, I-2, I-3, and I-4 are all homozygous individuals for the phenotype displayed in this pedigree, could this be (for each: yes or no, explain your reasoning) ....
A. Autosomal recessive inheritance?
B. Autosomal dominant inheritance?
C. X-linked recessive?
D. X-linked dominant?
Problem 4: Pedigree Analysis X-linked Recessive Inheritance
The above pedigree represents X-linked recessive inheritance.
A. Given this information, what is the genotype of Individual II-2? Explain.
B. What are the possible genotypes of Individual III-3? Explain.
C. Is it possible that this pedigree could represent Y-linked inheritance? Why or why not? Explain.