unit 2 lect 15 - Lecture 15 Reading: Biol 002 2-21-07...

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Lecture 15 Biol 002 2-21-07 Reading: Chapter 13: 257-258, 261, 265-270 Chapter 12: Figs. 12.2, 12.4, 12.6, 12.10, 12.13 Topics: Epistasis Human genetics: pedigree analysis, X-linkage Morgan, fruit flies, and discovery of chromosomal basis of genetics Implications of the chromosome theory of genetics Review again the following, knowing that I will not discuss them at any length in class: Human genetic diseases pleiotropic effects, polygenic (quantitative) trait You must be able to distinguish these two from each other and from epistasis And recognize examples of each, if a novel genetic situation were described to you Don't confuse polygenic trait with multiple alleles for a character e.g., human height (polygenic) vs. ABO blood type (multiple alleles for one gene) The specific pages to read were given in the study outline for lecture 14 Therefore, you should have read about them at least once already I. Epistasis (p. 257-258) Two non-allelic genes affect “expression” of each other; or one affects the other's expression " expression
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unit 2 lect 15 - Lecture 15 Reading: Biol 002 2-21-07...

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