Lecture 6 SRR F-2011

Lecture 6 SRR F-2011 - Biology 313 Lecture 6 Sept 2, 2011...

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Biology 313 Lecture 6 Sept 2, 2011 Madrid, Spain (2011): What is this person doing?
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Problems (Ch 3 Complete: Edition 4) Concept Checks: 1- 7 Worked Problems: 1-4 Comprehension Questions 1 – 11 Application Questions /Problems: 13, 14, 16, 17, 20, 22, 24, 25, 27, 28, 30, 31, 34, 38
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Vocabulary for Wednesday (Sept 7) Hermaphroditism Monoecious organism Dioecious organism Drosophila
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1. Mendel 2. Monohybrid Crosses: Mendel’s First Law, the Law of Segregation 4. Dihybrid Crosses: Mendel’s Second Law, the Law of Independent Assortment 5. Chi-square test Chapter 3 Basic Principles of Heredity
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Law of Independent Assortment Different genetic factors (alleles) assort randomly into gametes independently from one another (separation occurs at Anaphase I)
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An example of the 2nd Law from Chapter 2 (Figure 2-17) : random distribution of chromosomes at Anaphase I produces genetic variation m = maternal p = paternal
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How predict progeny for multiple traits? Branching method : an easier, faster way to predict progeny of crosses than Punnett Square, especially for more than two traits Independent assortment applies so can apply the multiplication rule
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Consider each gene (chromosome) separately Branching method for Dihybrid Cross: Phenotype Prediction Yy x Yy
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First trait Second trait Both traits
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How to work a genetics problem? See p. 59 (Worked Problem) (Good tips)
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1. Mendel 2. Monohybrid Crosses: Mendel’s First Law, the Law of Segregation 4. Dihybrid Crosses: Mendel’s Second Law, the Law of Independent Assortment 5. Chi-square test Chapter 3 Basic Principles of Heredity
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When two (or more!) genes segregate
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Lecture 6 SRR F-2011 - Biology 313 Lecture 6 Sept 2, 2011...

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