exam 2 lecture 20

exam 2 lecture 20 - Biology 313 Lecture 20 Oct 11, 2010...

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Biology 313 Lecture 20 Oct 11, 2010
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Review Testcross: independent assortment Testcross: completely linked genes Testcross: incompletely linked genes with crossing over
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Linkage & mode of inheritance of linked and non-linked genes Definitions: linked genes; notations Definitions: non-recombinant (parental) & recombinant gametes and progeny Testcross: independent assortment Testcross: completely linked genes Testcross: incompletely linked genes with crossing over Cis and trans (coupling and repulsion)
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Coupling (cis) and Repulsion (trans): Are mutant alleles of different genes on the same or different chromosomes? Coupling (cis configuration): when the two wild type alleles are found on one of the homologs and the two mutant alleles are on the other homolog Repulsion (trans configuration): when each homolog contains one wild type allele and a mutant allele
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Significance of cis and trans Whether the alleles in the heterozygous parent are in coupling or repulsion determines which phenotypes will be most common among the progeny of a testcross
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Recombination: a more precise definition Interchromosomal recombination : between genes on different chromosomes; arises from independent assortment Intrachromosomal recombination : between genes on the same chromosome; arises from crossing over
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This note was uploaded on 10/06/2011 for the course BIO 313 taught by Professor Rodermel during the Spring '11 term at Iowa State.

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exam 2 lecture 20 - Biology 313 Lecture 20 Oct 11, 2010...

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