Lab 23 Notes & Prelab

Lab 23 Notes & Prelab - Sarah Song BIO 205.33 April...

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Sarah Song April 15, 2008 BIO 205.33 Lab 23 Mendelian Genetics Notes Lab Meiosis vs. mitosis Meisosis = reduction-division Chromosomes: Sex chromosomes, autosomes, loci, and alleles Drosophila o 4 chromosome pairs total o 1 pair of sex chromosomes Female XX, male XY Autosomes: nothing to do with sex Alleles: variations of a gene Trait: phenotypic expression of a gene Mendelian Genetics Late 19 th century Drosophila as a Genetic Research Tool Drosophila melanogaster o Short generation time (9 days from egg to adult), large numbers of offspring, few chromosomes o Thomas Hunt Morgan 1909 Symbols used in Genetics : Mutant alleles used o Vestigial wing (vg) Chromosome 2 o Ebony (e) Chromosome 3 c + wild type body color o White-eye sex linked (w) Sex Linkage Sex linkage: inheritance of genes located on sex chromosomes Hemizygous: males have one X Corn as a Genetic Research Tool Barbara McClintock late 1920s o Correspondence between the expression of Mendelian factors and their physical
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This note was uploaded on 10/13/2008 for the course BIO 205 taught by Professor O'neal during the Spring '08 term at SUNY Stony Brook.

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Lab 23 Notes & Prelab - Sarah Song BIO 205.33 April...

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