slides1fall06 - Genetics PCB 3063 Section 6130

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Unformatted text preview: Genetics PCB 3063 Section 6130 http://www.zoo.ufl.edu/ebraun/PCB3063 Edward Braun Deena Westbrook Tejan Ottallah Introduction to Genetic Analysis Eighth Edition Chapters 1 and 6: Genetics and the Organism From Gene to Phenotype http://www.whfreeman.com/iga8e Copyright 2005 by W. H. Freeman & Company Anthony Griffiths Susan Wessler Richard Lewontin William Gelbart David Suzuki Jeffrey Miller Your text: The science of Genetics is the study of heredity. Modern genetics began early in the 20 th century with the rediscovery of the pioneering work of Gregor Mendel. Mendel worked on the garden pea, and he established that certain traits could be passed from generation to generation in an all-or-none manner. The shows the inheritance of color in maize, which is a very important model organism for genetics. Each kernel is a separate individual, potentially with a different genetic make-up from its neighbor. -What would have to be true about the parents of these kernels? What are the most popular organism for genetic experimentation?-There are a number of model systems. This slide shows bacteriophages infecting a bacterium. Fungi are also popular model systems. The yeasts ( Saccharomyces cerevisiae [Brewers yeast] and Schizo. pombe [fission yeast]) were used to make a number of fundamental discoveries in genetics. This image shows one of my favorite fungi, the orange bread mold Neurospora . - Neurospora species are fire adapted organisms. -The lab rat species of Neurospora is N. crassa . Plants are also popular model systems. Maize was used early in the 20 th century to examine the relationship between chromosomes and genes and to establish that genes can be mobile. This image shows thale cress or Arabidopsis thaliana , a weed related to the mustard plant. - Arabidopsis is popular because it grows relatively rapidly and has a small genome. However, it actually has a number of genes similar to our own genome. There are ~25,000 protein coding genes in both Arabidopsis and Humans The most popular animal models for genetic research are the fruit fly Drosophila melanogaster and the nematode Caenorhabditis elegans , both of which have very short life cycles and relatively small genomes. The mouse has been the most popular vertebrate model, but the practicality of complete genome sequencing has also made the pufferfish (which have the smallest genomes of any vertebrate) important for comparative work....
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This note was uploaded on 04/17/2008 for the course PCB 3063 taught by Professor Marta during the Spring '08 term at University of Florida.

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slides1fall06 - Genetics PCB 3063 Section 6130

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