A couple named Bob and Brené have 2 children: Angela (female) and Arnold (male). Arnold has sickle cell anemia, a disorder that arises from two recessive alleles of the beta globin gene. Genetic tests have revealed that Bob’s father Denzel has the recessive allele, but Bob’s mother Diane does not. Brené’s father Charlie does not have the recessive allele and her mother Candie was never tested, so we don’t know her genotype. A) Draw out the pedigree for this family and indicate each person’s name. Write out all the possible genotypes for each person (use “A” to represent a dominant allele of the gene and “a” to represent a recessive allele of the gene) and the probability that each person is each of those genotypes.
A couple named Bob and Brené have 2 children: Angela (female) and Arnold (male). Arnold has sickle cell anemia, a
disorder that arises from two recessive alleles of the beta globin gene.
Genetic tests have revealed that Bob’s father Denzel has the recessive allele, but Bob’s mother Diane does not. Brené’s father Charlie does not have the recessive allele and her mother Candie was never tested, so we don’t know her genotype.
A) Draw out the pedigree for this family and indicate each person’s name. Write out all the possible genotypes for each person (use “A” to represent a dominant allele of the gene and “a” to represent a recessive allele of the gene) and the probability that each person is each of those genotypes.

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