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Bio230 Ch 9 Quiz

Essential Cell Biology: How Genes and Genomes Evolve

QuestionAnswer
1. Which of the following is NOT a mechanism of genetic variation? Purifying selection
2. In sexually reproducing organisms, only changes to the germ line are passed along to progeny. True or False? True
3. What is the term for a change in a single nucleotide pair? Point mutation
4. Very often single nucleotide mutations have no effect on the single appearance or viability of an organism. True or False? True
5. Which adults have point mutations in the regulatory DNA of their lactase genes? Those who can digest lactose.
6. It is thought that gene duplications are generated by an error in what process? Homologous recombination
7. Point mutation can be caused by an error in what process? DNA replication and repair
8. Almost every gene in the genomes of vertebrates exists in multiple versions. True or False. True
9. In eukaryotes, individual protein domains are generally encoded by single? exons
10. Which structures in eukaryotic genes are thought to have facilitated the ability to duplicate a protein domain of a gene without damaging it in the recombination process? Introns
Created by: Liwa91
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