3333 Zoo/Bot Genetics Quiz 1 9/5/08 For the answers to the quiz, please click here Please choose the single best answer and record in #2 pencil on your scantrons. Please be sure to put your quiz group number next to your name on the scantron, filling out the BLUE side of the scantron. When a die is rolled, it has an equal probability of landing on any of its six sides. 1. What is the probability of rolling two 3s on two successive throws? a) 1/3; b) 1/6; c) 1/12; d) 1/36; e) none of the above. 2. What is the probability that one throw will result in a 3 and the other throw will result in a 6? a) 1/3; b) 1/6; c) 1/12; d) 1/36; e) none of the above. Pigeons exhibit a plain or a checkered color pattern. In a series of matings, the following data was obtained: Cross 1) Checkered x Checkered 2) Plain x Plain 3) Checkered x Plain 4) Checkered x Plain 5) Checkered x Checkered Progeny produced Checkered 34 31 14 26 Plain 35 17 9
3. True or false. For the pattern locus in question, the genotype of the checkered progeny produced in cross 3 is identical to the genotype of the checkered parents in cross 3. 4. Which of the above crosses can only produce homozygous progeny at this locus? a) cross 1; b) cross 2; c) cross 3; d) all of the above; e) cross 1 and cross 2, but not 3. 5. Which of the following statements is/are true? I. Hemochromatosis can be successfully treated by the ancient practice of bloodletting. II. The NBA basketball player Eddy Curry was requested to take a genetic test for a heart disorder by the Chicago Bulls. III. Huntington Disease is an autosomal recessive genetic that disorder leads to neurological dysfunction and eventually death. IV. Relative to Caucasians, much fewer African-Americans are afflicted with cystic fibrosis.
a) I only; b) II only; c) III only; d) all of the above; e) only 3 of the statements are correct. Consider the following genetic cross, where all loci are independently segregating.
AABbCcddEe x AaBbCCDdEe
6. What proportion of the progeny will phenotypically resemble the first (i.e. AABbCcddEe) parent? a) 9/32; b) 9/128; c) 27/128; d) 27/256; e) none of the above. 7. What proportion of the progeny will phenotypically resemble either parent? a) 1/32; b) 9/32; c) 27/64; d) 27/32; e) none of the above. 8. What proportion of the progeny will phenotypically resemble neither parent? a) 5/32; b) 81/216; c) 7/16; d) 37/64; e) none of the above. Questions 9 and 10 pertain to the following. Tay-Sachs disease (TSD) is an autosomal recessive disorder that leads to neurological deterioration and d...