Genetics Exam 3 Practice Questions for Effective Review

4/10/23, 11:39 PM Genetics Exam 3 Practice Questions https://docs.google.com/forms/d/e/1FAIpQLSdunVf8d4TGegJLCYgWJMXlB_YZXoSqK-UmN9zL8Ap3Ki5ONw/formResponse 1/10 Specific "Practice Problems for Exam 3" These are great questions to get you ready for the exam. There are even more questions on Canvas in the slide show with all of these but this was getting really long... lol. 1 point 10% 20% 30% 50% 0.2% 1 point independent assortment 25% recombination 30% recombination 60% recombination Genetics Exam 3 Practice Questions jessicastepp24@gmail.com (not shared) Switch account The genes A B C occur in that order in fruit flies. A is 10 map units from B, and B is 20 map units from C. If you test crossed triply heterozygous A B C/abc how much recombination would you expect between genes A and B? Two genes that are more than 50 map units apart are expected to show _____.

4/10/23, 11:39 PM Genetics Exam 3 Practice Questions https://docs.google.com/forms/d/e/1FAIpQLSdunVf8d4TGegJLCYgWJMXlB_YZXoSqK-UmN9zL8Ap3Ki5ONw/formResponse 2/10 1 point 2n = 126; aneuploid 2n = 126; euploid 2n = 63; aneuploid 2n = 63; euploid either 2n = 64 or 2n = 62, depending on whether the mother was the horse or the donkey; euploid. 1 point Endopolyploidy Allopolyploidy Autopolyploidy Trisomy 1 point two alleles are codominant there are at least three alleles there is simple dominance between two alleles there is a lethal allele A horse is 2 n = 64 and a donkey is 2 n = 62. If crossed, they produce the hybrid mule. There are _______chromosomes in a mule somatic cell. This cell is _________. Based on the description in the previous question, a mule is an example of A cross between two heterozygous short-tailed mice results in offspring in the ratio of 67 short-tailed and 34 long-tailed. The best explanation for this result is _____.

4/10/23, 11:39 PM Genetics Exam 3 Practice Questions https://docs.google.com/forms/d/e/1FAIpQLSdunVf8d4TGegJLCYgWJMXlB_YZXoSqK-UmN9zL8Ap3Ki5ONw/formResponse 3/10 1 point The allele is recessive. The development of the heart defect is determined by more than one locus. The allele has pleiotropic effects on development. The allele is codominant. 1 point Complete dominance. Incomplete dominance. Variation in expressivity. A lethal allele with haplosufficiency. Epistasis 1 point 10 15 25 30 In one strain of mouse, homozygotes for an allele of a gene develop heart defects. In a different strain of mouse, homozygotes for the same allele develop normally. Heterozygotes develop normally in both strains. What is the most likely explanation for the differences between the two strains. Two mice with medium tails were mated and produced the following offspring: 24 long tailed mice, 50 medium tailed mice, and 27 short tailed mice. These observations can BEST be explained by There are five alleles for a gene in a population of diploids. How many genotypes are possible in the population?

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4/10/23, 11:39 PM Genetics Exam 3 Practice Questions https://docs.google.com/forms/d/e/1FAIpQLSdunVf8d4TGegJLCYgWJMXlB_YZXoSqK-UmN9zL8Ap3Ki5ONw/formResponse 4/10 1 point White Brown Light brown Depends on the animal’s genotype Depends on the animal’s nutrition 1 point type O only types A or O types B or O types A, B, or O any blood type Fur color in Himalayan rabbits is controlled by a temperature-sensitive allele. The encoded protein does not produce brown pigment at high temperatures. If one hot summer, you shaved a small patch from your Himalayan rabbit’s brown paw, and then let it grow back while the rabbit played outdoors, what color would the fur grow back? Human blood-type is controlled by A, B, and O alleles. A and B are codominant with each other and completely dominant to O. If a mother has type A blood and her son has type O blood, what are the possible blood types of her son’s father?

4/10/23, 11:39 PM Genetics Exam 3 Practice Questions https://docs.google.com/forms/d/e/1FAIpQLSdunVf8d4TGegJLCYgWJMXlB_YZXoSqK-UmN9zL8Ap3Ki5ONw/formResponse 5/10 1 point could have inherited it from either parent must have inherited it from his mother must have inherited it from both parents can pass it along to all of his children can pass it along to only his sons 1 point Autosomal dominant Autosomal recessive X-linked dominant X-linked recessive Duchenne muscular dystrophy is caused by a recessive X-linked allele. A man with this disorder _____ A genetic counselor takes a family history of a disease and creates the above pedigree. What is the most likely mode of inheritance?

4/10/23, 11:39 PM Genetics Exam 3 Practice Questions https://docs.google.com/forms/d/e/1FAIpQLSdunVf8d4TGegJLCYgWJMXlB_YZXoSqK-UmN9zL8Ap3Ki5ONw/formResponse 6/10 1 point Hemizygous with the recessive allele Homozygous dominant Hemizygous with the dominant allele Homozygous recessive 1 point codominance. pleiotropy. polygenic inheritance. epistasis. maternal effect. What is the possible genotype for individual III-2? In maize, some alleles at the seed coat locus influence our ability to visually determine the endosperm color phenotype. Specifically, an opaque seed coat prevents us from seeing the endosperm within, while we can readily see the endosperm in seeds with transparent coats. The opaque coat color allele thus appears to mask the expression of endosperm color alleles, providing an example of

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4/10/23, 11:39 PM Genetics Exam 3 Practice Questions https://docs.google.com/forms/d/e/1FAIpQLSdunVf8d4TGegJLCYgWJMXlB_YZXoSqK-UmN9zL8Ap3Ki5ONw/formResponse 7/10 1 point X-linked dominant lethal X-linked recessive lethal Autosomal recessive lethal Autosomal dominant lethal 1 point Complete dominance Incomplete dominance Codominace Haploinsufficiency Dr. Mary Lyon, the scientist who discovered Lyonization, studied variegated mice (patches of white and brown). All of the variegated individuals were female. When she crossed variegated females to white males, she found 50 white females, 50 variegated females, and 50 white males. What is the best explanation of inheritance of this trait? In a plant species, two blue plants are mated and produce 303 blue plants and 98 white plants. These observations can best be explained by

4/10/23, 11:39 PM Genetics Exam 3 Practice Questions https://docs.google.com/forms/d/e/1FAIpQLSdunVf8d4TGegJLCYgWJMXlB_YZXoSqK-UmN9zL8Ap3Ki5ONw/formResponse 8/10 1 point XO individuals are female Most males are XY and most females are XX XX males have the SRY locus translocated onto one of their X chromosomes XY females have a deactivated SRY A and B A, C, and D A, B, C, and D 1 point Yes, this happens often. Yes, if the person is a translocation carrier. Yes, if it is the X chromosome that is monosomic. No, not having 46 chromosomes will always result in some phenotype. No, having only 45 chromosomes is lethal in humans. Which of the following is evidence for the genotypic sex determination over the balance theory of sex determination in humans? Can a person have 45 chromosomes and be phenotypically normal?

4/10/23, 11:39 PM Genetics Exam 3 Practice Questions https://docs.google.com/forms/d/e/1FAIpQLSdunVf8d4TGegJLCYgWJMXlB_YZXoSqK-UmN9zL8Ap3Ki5ONw/formResponse 9/10 1 point Deletion Duplication Insertion Nonreciprocal translocation Both deletions and duplications may be due to unequal crossing over Page 2 of 3 Never submit passwords through Google Forms. This content is neither created nor endorsed by Google. Report Abuse - Terms of Service - Privacy Policy Which of these may be due to unequal crossing over? Forms

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4/10/23, 11:39 PM Genetics Exam 3 Practice Questions https://docs.google.com/forms/d/e/1FAIpQLSdunVf8d4TGegJLCYgWJMXlB_YZXoSqK-UmN9zL8Ap3Ki5ONw/formResponse 10/10

Genetics Exam 3-2Practice Questions

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