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Which one of the following best describes the relationship between allele dominance and frequency of the allele in the population?

Three children have the following blood types: Type A, Type A, and Type O.  Which one of the following could not be the blood types of the parents?

Coat color in the calico cat is one of the classic examples of X-inactivation.  Examine the illustration of the tortoiseshell cat below and answer the associated questions.        a.  Which X-linked allele is inactive in the orange patches of the calico cat?      b.  Which X-linked allele is inactive in the white areas of the calico cat?      c.  Is this cat most likely a female or a male?  How do you know?

You suspect that a particular phenotype is the result of several genes being expressed together (polygenic inheritance).  You decide to document the occurrence of the phenotype in a population, so you sample about 1,000 people.  Which of the following characteristics are you likely to document if the phenotype actually is polygenic?  Select all correct choices.

Which one of the following correctly describes the activity of the Xist gene responsible for X-inactivation?

Coat color in the tortoiseshell cat is one of the classic examples of X-inactivation.  Examine the illustration of the tortoiseshell cat below and answer the associated questions. Is this cat most likely a male or most likely a female?  How do you know?

Which of the following terms describes the ability of a muscle to assume new length after the stretching force has been removed.

Red-headedness in humans is due to a recessive allele of the MC1R gene.  Geneticists know that the MC1R gene in humans displays epistasis.  What does this tell you about the activity of the MC1R gene?

Match the phenotype description with the most likely genetic explanation for that phenotype.