Test__20890[1] - Print Test

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Print Test https://www.casa.uh.edu/CourseWare/Root/UsersStudents/PrintTest.htm 1 of 7 4/22/07 2:28 PM PRINTABLE VERSION Test 1 You scored 100 out of 100 Question 1 Your answer is CORRECT. The following figure shows an organism with two traits (X and Y) according to Fisher's geometric model. The optimal phenotype is at the origin (O). A genotype sits at the closed dot. The arrows represent random mutations with different magnitudes and directions. The shortest arrow is an example of a mutation of small effect, and the longest arrow is an example of a mutation of large effect. Which of the following statements summarizes Fisher's conclusion from this model? a) Most mutations tend to be neutral, regardless of the magnitude of their effect b) Mutations of large effect are more likely to be beneficial than mutations of small effect c) Most mutations tend to have a small effect, regardless of whether they are deleterious, beneficial or neutral d) Mutations of small effect are more likely to be beneficial than mutations of large effect e) Most mutations tend to have a large effect, regardless of whether they are deleterious, beneficial or neutral Question 2 Your answer is CORRECT. A large population is in Hardy-Weinberg equilibrium at a locus A with two alleles, A and a . The frequency of the A allele is p . Assuming that the population mates at random with respect to the A locus, and that there is no selection or mutation at this locus, what is the expected frequency of the a allele 10 generations later? a) 2 p (1- p ) b) 1- p c) 2 p 2 d) 2 p e) p 2 Question 3 Your answer is CORRECT. In humans, the COL1A1 locus codes for a collagen protein found in bone. The normal allele at this locus is denoted S . Another allele, s , is associated with reduced bone mineral density. A survey found the following relative genotypic frequencies: 0.689 SS , 0.282 Ss , and 0.029 ss . What is the frequency of the s allele? a) 0.68 b) 0.17 c) 0.26 d) 0.82 e) 0.89 Question 4 Your answer is CORRECT. Evolution can be thought of as both a pattern and a process that generates that pattern. Which of the following statements about these two aspects of evolution is q=0.029+0.282/2=0.17
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Print Test https://www.casa.uh.edu/CourseWare/Root/UsersStudents/PrintTest.htm 2 of 7 4/22/07 2:28 PM correct? a) An example of the process of evolution would be the beak morphology of the different species of finch in each Galapagos island. Another process might be natural selection on beak morphology resulting from variation in the availability of different food resources in each island, such as insects and seeds of different sizes. b) An example of the pattern of evolution would be the beak morphology of the different species of finch in each Galapagos island. Another pattern might be natural selection on beak morphology resulting from variation in the availability of different food resources in each island, such as insects and seeds of different sizes. c)
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This note was uploaded on 07/27/2011 for the course BIOL 3306 taught by Professor Zufall during the Spring '09 term at University of Houston.

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Test__20890[1] - Print Test

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