lecture22 - BioEE 278 Evolutionary Biology Fall 2007...

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BioEE 278 Fall 2007 Evolutionary Biology Lecture 22 EVOLUTION OF GENES AND GENOMES Reading: Ch. 19, pp. 419-459 (bottom), pp. 461 (middle)-463(middle), pp. 465 (middle)-467 A. Origin genomic variation 1. How have genes and genomes evolved? 2. How do new structures and new functions arise (novelty)? 3. Can we understand evolutionary history and mechanisms by comparing genomes across lineages? B. Genome size and genome composition 1. Genome size varies widely. b. genome size and organism complexity c. the C-value paradox 2. Presence of non-coding sequences. a. coding vs. non-coding DNA b. single copy and repeated sequences 3. Gene sequence in eukaryotes a. introns - early or late? 4. Highly repetitive DNA a. multiple types b. transposable elements c. function of introns and repetitive sequences 5. Genes of low to moderate copy number a. examples C. Source of genetic and functional novelty 1. Lateral genome a. Movement of genomes and genes across species boundaries.
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This note was uploaded on 09/28/2008 for the course BIOEE 2780 taught by Professor Geber during the Fall '07 term at Cornell.

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lecture22 - BioEE 278 Evolutionary Biology Fall 2007...

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