graded quiz unit 3.docx - CPH 4212 Genetics Term 1...

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CPH 4212 Genetics - Term 1, 2019-2020 Page path Home / ► My courses / ► CPH 4212 - AY2020-T1 / ► 19 September - 25 September / ► Graded Quiz Unit 3 Started on Friday, 20 September 2019, 10:49 PM State Finished Completed on Friday, 20 September 2019, 11:19 PM Time taken 30 mins 2 secs Marks 12.00/20.00 Grade 60.00 out of 100.00 Question 1CorrectMark 1.00 out of 1.00Flag questionQuestion textSuppose you have a population of flour beetles with 1,000 individuals. Normally the beetles are red; however, this population is polymorphic for a mutant autosomal body color, black, designated by bb. Red is dominant to black, so BB and Bb genotypes are red. Assume the population is at Hardy–Weinberg equilibrium, with equal frequencies of the two alleles. What would be the expected frequencies of the homozygous dominant, heterozygous, and homozygousrecessive (in that order) after 100 generations, assuming that no selection or other evolutionary processes are operating?Select one: a. 0.75; 0.20; 0.05
b. 0.25; 0.5; 0.25 c. All red, because it is the natural color d. All black, because all red alleles would mutate to black Feedback Your answer is correct. The correct answer is: 0.25; 0.5; 0.25 Question 2CorrectMark 1.00 out of 1.00Flag questionQuestion textIn a species of tortoise, foot size (big or small) is controlled by one gene, while shell shape (round or lumpy) is controlled by another gene. Suppose that a big-footed lumpy-shelled tortoise mates with a small-footed round-shelled tortoise. Eight offspring result: four big-footed round-shelled tortoises and four small-footed round-shelled tortoises. (Assume that the parents are not necessarily homozygous for each allele.) Which statement about the inheritance of shell shape intortoises is most likely to be correct, given your genetic analysis of the tortoise family?Select one:
Round is dominant to lumpy c. Round and lumpy are co-dominant d. Both a and c e. This cannot be answered without more information Feedback Your answer is correct. The correct answer is: Round is dominant to lumpy Question 3CorrectMark 1.00 out of 1.00Flag questionQuestion textIf Mendel’s crosses between pea plants with spherical yellow seeds and pea plants with wrinkled green seeds had produced an F2generation in which many more than one-sixteenth of the plants had wrinkled green seeds, we could conclude thatSelect one:
b. the wrinkled and green traits are un-linked c. all traits in peas assort independently d. all traits in peas are linked e. None of the above Feedback Your answer is correct. The correct answer is: the spherical and yellow traits are linked

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