2005_campbl15

2005_campbl15 - Important Point Chromosomal Basis of...

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1 Chapter 15: The Chromosomal Basis of Inheritance Important Point: Chromosomal Basis of Inheritance Independent Assortment Independent Assortment “Notice… that one-half of the offspring are expected to inherit a phenotype that matches one of he parental types.” p. 278, 2-Locus Test Cross Special dihybrid with b + and vg + on same chro- mosome Æ Recessive “Blank Slate” Parental Types Parental Types Recombinant Types “Expected” assumes Independent Assortment
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2 Deviation from Expected Linkage Basis of recombinant types Parental types 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% Constructing Genetic Maps 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 - Important Point Chromosomal Basis of...

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