Final Exam Solved exp

Final Exam Solved exp - Student ID # Answers below are...

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Student ID # 1 Answers below are given for exam A. The question numbers for exams B and C are given below relative to A. We have thrown out # 3 and T/F question v, both relative to exam A. A B C 1 3 3 2 4 4 3 5 8 4 1 9 5 2 7 6 8 10 7 9 17 8 6 2 9 7 19 10 13 20 11 10 11 12 12 13 13 14 14 14 11 12 15 16 16 16 17 18 17 15 15 18 19 5 19 20 6 20 18 21 21 21 1 22 25 25 23 26 22 24 22 23 25 23 24 26 24 26 a p i b q h c r j d s k e t o f u p g a q h b r i c a j n b k o c
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Student ID # 2 l v d m h e n i f o j g p k m q l n r m s s d t t e u u f v v g l 1. A flowering plant has 5 complete sets of chromosomes. Is this plant fertile? 1pt No 2. You have mapped the recessive, single gene trait of “no wings” in Drosophila with tight linkage to SSR 39. How will you use this information to figure out the mutated gene responsible for the trait? 2pt THROWN OUT. Because we know the sequences of the genes surrounding SSR 39, we would sequence the neighboring genes from “no wings” flies and normal flies and look for a gene in which we find mutations from “no wings” flies but not in normal flies . 3. A geneticist would like to determine why a child has Down syndrome. Would RFLP analysis of markers on chromosome 21 help a geneticist distinguish between trisomy 21 or a Robertsonian translocation involving chromosomes 21 and 14? No (both result in 3 copies of chromosome 21 which would give identical RFLPs) 1pt 4. You have been studying karyotypes of cancer cells. In one cancer cell you discover that chromosome 4, a chromosome that normally has a short arm and a long arm has instead two long arms. You immediately check the other chromosomes and they all look normal. 3pt a. What do you hypothesize happened in this chromosome? amplification (duplication also accepted)
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Student ID # 3 b. What sort of gene would you expect to find in this region of the chromosome? oncogene c. Unfortunately, you dropped the karyotype on the floor and didn’t get a chance to look at the second chromosome 4 (in your earlier haste to check the other chromosomes, you forgot to look at chromosome 4’s homolog!). Would you expect that the homolog also has this feature? No, the amplification is a somatic mutation and only affects one homolog. 5. A calico female cat mates with a black male cat. There are 3 female calico kittens in the litter. Is the calico pattern of each female identical to its sisters? Explain your answer. 1pt No, X-inactivation is random. (also accepted answers explaining that dosage compensation is random) 6. Studies have shown that the broad-sense heritability for the multifactorial threshold disease called Kiki’s disease (splotchy skin) is 0.1. Your brother has Kiki’s disease and you don’t. 2pt a. Is your child likely to have Kiki’s disease? Why or why not? No, broad-sense heritability of 0.1 means virtually NO genetic
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Final Exam Solved exp - Student ID # Answers below are...

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