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Describe three ways in which heterozygous combinations of alleles may be expressed. Give an example of each.

Explain the transmission of sex-linked characteristics. Include the relative frequencies of sex-linked characteristics in females versus males, and give an example.

Choose two of the following sex-chromosome abnormalities: Turner syndrome, triple-X syndrome, Klinefelter’s syndrome, fragile-X syndrome. For each, describe the abnormality as well as its effects.

Describe each of the following principles of heredity/environment interactions, and give an example of each: range of reaction, canalization, niche picking.

Describe the ways in which family resemblance is used to look at the relative contributions of environment and heredity. Include the importance of shared and nonshared environments.

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