Test 2 Sample Lab - Page 1 of 5 Sample Lab Test Questions 09W 1 Gel electrophoresis is conducted for the XYZ-2 locus for a sample of zebra mussels

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Page 1 of 5 Sample Lab Test Questions 09W 1. Gel electrophoresis is conducted for the XYZ-2 locus for a sample of zebra mussels. Given the gel results shown below, which statements are CORRECT? i. The observed heterozygosity is 0.01 ii. XYZ-2 is a dimer. iii. The observed frequency of FF individuals is 0.5 iv. The expected number of SS individuals is 5 if the population is in genetic equilibrium. a. i only b. ii and iv c. i and iii d. iv only e. ii and iii 2. Two samples from a population of a diploid organism have a combined heterozygosity of 0.001. Which of the following hypotheses are not a realistic explanation of this result? i. The population is very small ii. There are actually two groups of organisms that look similar but have limited gene flow between them. iii. Heterozygotes have low fitness a. i only b. ii only c. iii only d. i and iii e. ii and iii 3. The GDH-1 locus encodes a gene for tail feather length in a species of bird. A gel electrophoresis of the GDH-1 locus reveals that a population of this species is not at genetic equilibrium. Which of the following statements does NOT offer a possible explanation of this result? a. Females display a mating preference for males with long tail feathers. b. There is a geographic barrier separating the population from a nearby population of the same species. c. The population is small. d. Individuals with long tail feathers are more vulnerable to predation. e. Mutations have arisen at this locus. Copyright © 2009, BIO150
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Page 2 of 5 4. A species of insect resides in an area where there is a limited supply of food. The immature stages feed on different food sources than the adult stage. Adult females feed on nectar, whereas adult males prey on smaller invertebrates. Given the above information, which statements are possible descriptions of the insect’s lifestyle and/or morphology? i.
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This note was uploaded on 11/24/2010 for the course BIO BIO150Y1Y taught by Professor Barret,thomson during the Spring '07 term at University of Toronto- Toronto.

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Test 2 Sample Lab - Page 1 of 5 Sample Lab Test Questions 09W 1 Gel electrophoresis is conducted for the XYZ-2 locus for a sample of zebra mussels

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