ch7-part1 - Ch 7 Tetrad Analysis in Certain Haploid...

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Ch 7 Tetrad Analysis in Certain Haploid Eukaryotes Tetrad analysis – special mapping technique that can be used to map the genes of haploid eukaryotic organisms in which meiotic tetrads (the products of a single meiosis) are contained w/in a single structure occurs in fungi or single-celled algae, both of which are found predominantly in an haploid state during sexual reproduction, a diploid is formed undergoes meiosis to produce spores germinate to produce next haploid generation used w/ yeast, Saccharomyces cerevisiae , organge bread mold Neurospora crassa , and single-celled alga Chlamydomonas reinhardtii by analyzing phenotype of meiotic tetrads, geneticists can infer the genotypes of each member of the tetrad directly, b/c haploid organisms only have one copy of each gene dominance and recessiveness don’t come into play How Meiotic tetrads arise in the life cycles of organisms Yeast α ascospores are released when the ascus is ripe unordered tetrad: 4 ascospores in the ascus are arranged randomly single-celled alga Chlamydomonas reinhardtii swims around w/ motion of 2 flagella when nitrogen is limited, cells change to become gametes
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This note was uploaded on 02/09/2010 for the course BIOL 3301 taught by Professor Hannig/miller during the Spring '10 term at Dallas.

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ch7-part1 - Ch 7 Tetrad Analysis in Certain Haploid...

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