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Stearns & Hoekstra: Evolution 2e

Chapter 05


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Question 01

Which of the following statements about mutations in animals is correct?

Question 02

Most mutations are a consequence of errors during DNA replication and the rate at which they occur cannot be influenced by natural selection. True or false?

Question 03

Selective adjustment of the mutation rate is expected to be easier in asexual than in sexual organisms. True or false?

Question 04

Most organisms have DNA genomes, but some viruses have RNA genomes. Which of the following statements is correct?

Question 05

Which is more common: mutations with small phenotypic effect or with large phenotypic effect; and dominant or recessive mutations?

Question 06

There is some evidence from data on human genetic diseases that point mutations occur at a higher rate in males than in females. What is a likely explanation?

Question 07

In what respect are mutations occurring randomly?

Question 08

Multi-gene families have arisen from:

Question 09

How important is the effect of meiotic recombination on genetic variation?

Question 10

What is a general but fair characterization of the amount of genetic variation at the DNA sequence level occurring in natural populations?

Question 11

How can a comparison of the rates of synonymous and non-synonymous substitution provide insight in the relative importance of natural selection and genetic drift as mechanisms producing genetic variation?

Question 12

A general conclusion about the most likely explanation of the observed high amounts of molecular genetic variation in populations, based on a large number of studies, is:

Question 13

Which mode of natural selection is most important in maintaining genetic variation at single loci?

Question 14

Which type of selection has been shown to be responsible for the stable maintenance of the hemoglobin polymorphism associated with malaria?

Question 15

The maintenance of quantitative genetic variation (involved in quantitative traits) is most likely maintained by which of the following?