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Genetic inheritance

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Unattached earlobes are a dominant trait. If A denotes the allele for unattached earlobes, and a denotes the allele for attached earlobes, what is (are) the possible genotype(s) of a person who has unattached earlobes? Could both parents of a person with unattached earlobes have attached earlobes? Why or why not?

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Solution Preview

First let's look at the information given. The attachement of earlobes is given as a single gene trait with two alleles in a dominant recessive ...

Solution Summary

Punnett square analysis of a dominant/recessive di-allelic trait.