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This assignment consists of two questions. Each of your responses should be one or more paragraphs long, depending upon the depth of the question. An answer consisting of only a few short sentences is insufficient, and will receive a poor grade. Please include references where appropriate.
- Describe how the human Y chromosome is different from the human X chromosome in terms of overall size and total number of genes. How does the Y chromosome determine maleness in a human embryo?
- Almost all calico cats are female. Use the terms Lyon hypothesis, X-inactivation, Barr body, and dosage compensation to explain the mechanisms that give calico cats their patchwork coats. Under what circumstances can a calico cat be male?