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Study Guide, Chapter 21

Study Guide, Chapter 21 - genes through duplication forming...

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BSCI105, Freshman Connection Fall 2010 Study Guide #13 I. Genome Evolution Vocabulary: Homologous Gene Genome Coding DNA Non-coding DNA Repeat/Repetitive DNA Heterochromatin Translocation Key Concept 1: Genomes vary in size, gene number, and gene density, all of which impact genomic complexity of an organism. Key Concept 2: Eukaryotic genomes include large amounts of non-coding DNA, including regulatory elements, structural RNAs (rRNA, tRNA), and repetitive DNA of unknown function (heterochromatin). Key Concept 3: Eukaryotic genome evolution is marked by the diversification of homologous
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Unformatted text preview: genes through duplication, forming multigene families. Key Concept 4: Gene duplication can occur through whole genome duplication, duplication of chromosomal segments, or duplication of individual genes. Key Concept 5: Repeated duplication can produce large, tandem arrays of individual genes, which is beneficial when a lot of RNA needs to be made quickly. Key Concept 6: The structure of whole genomes can evolve through exchange of chromosomal segments by translocation, duplication of chromosomal segments, or deletions of chromosomal segments....
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