Lecture 7 Questions

Lecture 7 Questions - Lecture 7: Study Questions 1. What...

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Lecture 7 : Study Questions 1. What three factors complicate the task of studying the inheritance of human characteristics? 2. Who is the proband in a pedigree? Is the proband always found in the last generation of the pedigree? Why or why not? 3. For each of the following modes of inheritance, describe the features that will be exhibited in a pedigree in which the trait is present: autosomal recessive, autosomal dominant, X-linked recessive, X-linked dominant, and Y-linked inheritance. 4. How does the pedigree of an autosomal recessive trait differ from the pedigree of an X-linked recessive trait? 5. Other than the fact that a Y-linked trait appears only in males, how does the pedigree of a Y- linked trait differ from the pedigree of an autosomal dominant trait? 7. Joe is color blind. His mother and father have normal vision, but his mother’s father (Joe’s maternal grandfather) is color blind. All Joe’s other grandparents have normal color vision. Joe has three sisters—Patty, Betsy, and Lora, all with normal color vision. Joe’s oldest sister, Patty, is married to a man with normal color vision; they have two children, a 9-year-old color-blind boy and a 4-year-old girl with normal color vision. a. Using correct symbols and labels, draw a pedigree of Joe’s family. b. What is the most likely mode of inheritance for color blindness in Joe’s family?
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This note was uploaded on 05/07/2011 for the course BIOLOGY 352 taught by Professor Townsend during the Spring '08 term at San Diego State.

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Lecture 7 Questions - Lecture 7: Study Questions 1. What...

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