2005_campbl15

2005_campbl15 - Chapter 15: The Chromosomal Basis of...

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Chapter 15: The Chromosomal Basis of Inheritance
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Important Point:
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Chromosomal Basis of Inheritance
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Independent Assortment
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Independent Assortment “Notice… that one-half of the offspring are expected to inherit a phenotype that matches one of he parental types.” p. 278, Campbell & Reece (2005)
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2-Locus Test Cross Special dihybrid with b + and vg + on same chro- mosome Recessive “Blank Slate” Parental Types Parental Types Recombinant Types “Expected” assumes Independent Assortment
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Deviation from Expected
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Linkage Basis of recombinant types Parental types
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Frequency of Recombination Recombinant types Frequency of recombination Note that it is the recombinant types that there are fewer or Note that max = 50% (which occurs when loci are either on separate chromosomes or very far apart on the same chromosome) Complete linkage give frequency of recombination of 0%
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Best way to interpret this data is that b and vg are about twice as far apart as b is from
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This note was uploaded on 06/03/2011 for the course BIO 113 taught by Professor Swenson during the Spring '08 term at Ohio State.

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2005_campbl15 - Chapter 15: The Chromosomal Basis of...

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