A man and woman are deciding whether to have a child. The genotype of the man includes a recessive allele for an inherited disease. The genotype of the woman

does not include this allele. Both parents have a normal phenotype. Could the child

inherit the disease? Explain your reasoning

No, the child cannot inherit the disease.

Explanation:

The problem tells you that the man has a recessive allele for an inherited disease, but he has a normal phenotype. This means that the disease is recessive and in order for an individual to have the disease, they must have two recessive copies of the allele. The problem also tells you that the mother has a genotype that does not include this allele. With this information, you can do a punnet cross of BB (mother) x Bb (carrier father), and end up with the following possible genotypes: BB, Bb, BB, Bb. Therefore the child will not have the disease, but there is a 50% chance that the child will be a carrier for the disease.

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explanation: