m06-part2 - Student Name: Student Number: 56. in a...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Student Name: Student Number: 56. in a population in mutation-selection equilibrium, u is the mutation rate of A to a and 3 IS the selection coefficient against the a/a homozygote. If the mutation rate, u, is 10 '5 and the selection coefficient, 3, is 0.1, what is the equilibrium value of the a allele? A) 0.000001 B) 0.00001 C) 0.0001 D) 0.001 E) 0.01 57. A completely recessive gene (Q1 ) has a frequency of 0.7 in a large population, and the Q1/Q1 homozygote has a relative fitness of 0.6. What will be the frequency of Q1 after one generation of selection? A) 0.29 B) 0.39 C) 0.42 D) 0.50 E) 0.63 58. A population of 80 adult squirrels resides on campus, and the frequency of the Est1 allele among these squirrels is 0.70. Another population of squirrels lives in a nearby wood, and the frequency of the Est1 allele there is 0.50. During a severe winter, 20 of the squirrels from the woods population migrate to campus in search of food and join the campus population. What will be the allelic frequency of Est1 in the campus population after this migration? A) 0.54 B) 0.57 o) 0.60 D) 0.66 E) 0.74 59. lf the frequency of the A1 allele at the A locus is p(A 1) and the frequency of the B1 allele at the B locus is p(B1), then the occurrence of the A1 and the B1 alleles in the same gamete (i.e. f(A 1.31) at the frequency of p(A 1) X p(B1) indicates A) linkage equilibrium. B) linkage disequilibrium. C) disassortative mating. D) assortative mating. E) close linkage Page 16 of 19 Student Name: Student Number: 60. Red-green colour blindness is caused by an X—linked recessive gene. About 64 women out of 10,000 are colour blind. What proportion of men would be expected to be colour blind if mating is random? A) 0.8 B) 0.64 C) 0.15 D) 0.08 E) 0.0064 61. Frequency of disease alleles is influenced by: A) heterozygous advantage. B) mutation. C) time of onset of disease. D) selection. E) all of the above. 62. Which form of selection will probably be the most effective in the short run? A) selection against a dominant phenotype B) selection against a recessive phenotype C) selection against the heterozygote D) selection against the homozygotes E) mutation-selection equilibrium 63. In the mid-1700’s, a multitoed male cat from England crossed the sea and settled in Boston, where he left behind quite a legacy of kittens — about half of whom also had six to nine digits on their paws. Today, in Boston and nearby regions, multitoed cats are far more common than in other parts of the US. What is this an example of? A) Mutation B) Migration C) inbreeding D) Natural selection E) Founder effect 64. An example of post-zygotic isolation is A) geographical isolation. B) physical incompatibility of sexual organs. C) gametic incompatibility. D) hybrid sterility. E) genetic bottleneck. Page 17 of19 Student Name: Student Number: R 65. Which of the following forces tends to result in divergent populations? A) Mutation B) Genetic drift C) Migration D) Balanced polymorphism E) Random mating 66. The average synonymous substitution rate in mammalian mitochondrial genes is approximately 10 times the average value for synonymous substitutions in nuclear genes. For which of the following would it be better to use comparison of mitochondrial sequences? A) To study human migration patterns B) To study phylogenetic relationships of mammalian species that diverged 80 million years ago C) To study the divergence of mammals and reptiles D) To study the separation of vertebrates from invertebrates E) To study the separation of the ancestors of plants and animals 67. What does extensive environmental variation in the expression of a genetically controlled trait tend to produce? A) genetic uniformity. B) little variation within a genotypic class. C) little variation within a phenotypic class. D) genotypes with overlapping phenotypes. E) discreet phenotypes. 68. A recent article in the UK Daily News reported on the birth of fraternal twins, one was fair—skinned while the other was dark-skinned. The parents were both of mixed race. Given that it is believed that 7 genes determine skin colour, and assuming that both parents were heterozygous for each of those 7 genes, what is the correct calculation for the odds of having twins where one had only the fair alleles (Le. homozygous fair) while the other was homozygous for the dark alleles? A) (1/2)7 x (1/2)7 = (1/2)14 B) ((1/2)7 x (1/2)7)2 = (1/2)?8 C) 2((1/2)7 x (1/2)?) = 2(1/2)14 D) 2((1/2 7 x (1/2 7)2 = 2(1/2)28 E) ((1/4) x (1/4) )2 = (1/4)28 Page 18 of 19 Student Name: Student Number: 69. Five field mice collected in Ontario had weights of 20.2 g, 21.2 g, 20.4 g, 22.0 g and 19.7 Q. What is the variance? A) 0.656 B) 0.310 C) 2.60 D) 3.23 E) 20.7 70. Corn growing in a field had a lysine content of 2.0%, with a variance of 0.16. When grown in a greenhouse under controlled and uniform conditions, the mean lysine content was again 2.0%, but the variance was 0.09. What is the heritability? A) 0.64 B) 0.56 C) 0.44 D) 0.36 E) 0.13 Page 19 of 19 ...
View Full Document

Page1 / 4

m06-part2 - Student Name: Student Number: 56. in a...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online