BS110 Lecture 6 - Monday Jan 28th What is the source of...

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Monday Jan 28th What is the source of variation among individuals?
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Source of variation among individuals? Different alleles in a population Mutations (sometimes lethal, sometimes can add more variation to a population) Crossing over during meiosis
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Mid-digital Hair Some people have hair on the second (middle) joint of one or more of their fingers, while others don’t. Having any hair at all means that you have the dominant phenotype. Complete absence of hair is recessive. Alleles: H, h Dominant phenotype: hair on skin finger’s second joint Dominant genotype: H – Recessive genotype: hh
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Hand Clasping Clasp your hands together (without thinking about it!). Most people place their left thumb on top of their right and this happens to be the dominant phenotype. Now, for fun, try clasping your hands so that the opposite thumb is on top. Feels strange and unnatural, doesn’t it? Alleles: L,l
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This note was uploaded on 03/30/2008 for the course BS 110 taught by Professor S.lawrence during the Spring '07 term at Michigan State University.

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BS110 Lecture 6 - Monday Jan 28th What is the source of...

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