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Unformatted text preview: might explain this discrepancy? (Concept Check 21.3.1) 3-71. Approximately what percentage of the human genome codes for proteins (or rRNA, tRNA)? 3-72. The majority of the human genome consists of DNA in what pattern? Is this coding DNA? 3-73. What is a pseudogene? Give an example of how a pseudogene could develop. 3-74. What is a transposon? A retrotransposon? How do transposons spread through a genome? 3-75. Describe how new genes can form by the combination of gene duplication and mutation. 3-76. What is a multi-gene family? Following Fig 21.13, describe some processes by which the human globin gene families might have evolved from a single ancestral globin. 3-77. Explain how new proteins can evolve over time by exon shuffling mutations....
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- Fall '08