352SLecture07_S11 - Genetics and Evolution: Lecture #7...

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1 Genetics and Evolution: Lecture #7 Pedigree Analysis Today’s Topics 1. Autosomal recessive traits 2. Autosomal dominant traits 3. X-linked recessive traits 4. X-linked dominant traits 5. Y-linked traits Readings: Pierce, pgs. 134 - 142 Human Genetics Humans are the most thoroughly studied of all species – e.g. anatomy, physiology, biochemistry, etc. Constraints on human genetic research: 1. Generation time – ca. 20 years. 2. Small family size – difFcult to observe ratios. 3. Ethical concerns – controlled matings are not possible. Pedigree Analysis ±amilies often keep detailed records that cover generations. ±amily records often contain genetic information. Pedigree : - Pictorial representation of a family history. - Can be used to determine modes of inheritance. Figure 6.2 – symbols used in pedigrees.
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2 Pedigree Analysis Questions to ask when looking at a pedigree: 1. Do equal number of males and females display the trait? 2.
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352SLecture07_S11 - Genetics and Evolution: Lecture #7...

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