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UT Knoxville BIOL 240 - Quiz 2 with key

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Bio 240, Quiz – 2 (wk of Sept 7, 2014) with keyName_________________________ I.D#_____________________Section #___________1. A recessive allele in tigers causes the white tiger. If two normally pigmented tigers are mated and produce a white offspring, what percentage of their remaining offspring wouldbe expected to have normal pigmentation? 1 pta) 25%b) 50%c) about 66%d) 75%e) about 90%Use this description for questions 2-5: Albinism, lack of pigmentation in humans, results from an autosomal recessive gene. Two parents with normal pigmentation have an albino child.2. What is the probability that their next child will be albino? 1 pta) 50%b) 75%c) ¼d) 100%3. What is the probability that their next child will be an albino girl? 1 pta) ¼b) 1/8c) ¾d) 1/16e) ½ 4. How many different kinds of gametes can be produced by an individual with the genotype AABbCCddEeFf? 1 pta) 26b) 24c) 8d) 65. Consider A is allelic to a, and B is allelic to b, and they assort independently. Suppose a male with genotype AaBb was crossed to a female with AaBb genotype. What proportion of their F1 progeny will be A-bb? Need to show the calculation to get the answer. 2 pts¾ x ¼ = 3/16Use this description for questions 6 & 7 In humans, red-green color blindness (c) is an X-linked recessive trait. The wild type allele is c+.Individuals carrying c+ alleles are normal. 6. The filled box shown in the following pedigree indicates colorblind phenotype. Determine the genotype of the individual marked with an arrow. 2 ptsC+/c7. A normal woman whose mother was colorblind and father was normal marries a normal man. What proportion of their daughters and sons is expected to be colorblind?a) Write the phenotypes of their daughters (use the alleles mention above) 1 ptAll normalb) Write the genotypes of their sons (use the alleles mentioned above) 1 ptc+/Y and


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