325genC4 EukChromMapping

325genC4 EukChromMapping - C4 Eukaryote Chromosome Mapping...

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Unformatted text preview: C4: Eukaryote Chromosome Mapping and Recombination • Definition of linkage: • Two or more loci are linked if they are on the same chromosome. • Linkage reduced the variability of the gametes. • The amount of linkage is under evolutionary control. • Definition of meiotic recombination: • Any meiotic process that generates a haploid product with a genotype that differs from both haploid genotypes that constituted the meiotic diploid cell. • Meiotic recombination can occur by independent assortment of unlinked loci. • It can also occur by crossing over between two loci. • Example: • An individual cell with the genotype of AaBb was the result of the fusion of an AB gamete with and ab gamete. • If AaBb cell produces the following gametes: AB, ab, Ab, aB, • the parental gametes are the AB and ab gamete types. • the Ab and aB types are called recombinants. • The reverse would be true if the gametes that produced the AaBb genotype were Ab and aB. •...
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This note was uploaded on 04/07/2008 for the course BIO 325 taught by Professor Saxena during the Spring '08 term at University of Texas.

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325genC4 EukChromMapping - C4 Eukaryote Chromosome Mapping...

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