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AGR 3303 (3 credits) University of Florida - Fort Lauderdale  |
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| Below is exam #1, Part B, for 1994, Mendelian
genetics |
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AGR 3303 - Genetics 17 Oct 1994 University of Florida - Fort Lauderdale Exam #1 B (bonus): PARTICULATE GENETICS
Whenever possible, show your work in the margins, or on the reverse side of the sheet. Partial credit may sometimes be granted for correctly setting up the problem, even if the final answer is wrong. For many students, first drawing a problem in graphic symbols helps the mind to embrace the genetic concept. 1. When does a woman receive her X chromosome from a specific grand-parent? For each of the four grandparent statements, place a check mark in the one correct "when" column (4 pts.)
2. Hemophilia in humans is a rare, sex-linked, recessive trait. Queen Victoria, a carrier of hemophilia, had a grandson Kaiser Wilhelm II. (Wilhelm's mother was Victoria's daughter). Based on Mendelian expectations, what is the likelihood that Kaiser Wilhelm had hemophilia? (3 pts.)
_______________ % University of Florida - Fort Lauderdale 3. Queen Victoria had another grandson, King George V. (George's father was Victoria's son). Based on Mendelian expectations, what is the likelihood that George V had hemophilia? (3 pts.)
_______________ % 4. A double heterozygous plant (genotype AaBb) is fertilized with the homozygous recessive tester (aabb). What is the expected frequency (%) of the four possible progeny genotypes, under the following gene conditions: (8 pts.)
(d) Important: did you assume that the genes for parts (a) and (b) were in coupling (AB//ab) or repulsion (Ab//aB)?
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Multiple choice. (12 pts.) Please read these carefully. One and only one response (a, b, c, d, or e) completely and correctly answers the question, or completes the statement. Circle the appropriate response. Make sure your circle is unambiguous. 5. In a genetics experiment on peas, far too many progeny were observed for a particular phenotypic class, compared with their expected frequency. This would fit with the statement that: a. the null hypothesis should be accepted b. the P value must be high, certainly P > 0.05 c. the experiment was a success d. all of the above e. none of the above 6. Consider three genes, each with two alleles. In a diploid organism, how many possible genotypes are there? a. 6 b. 8 c. 9 d. 16 e. 27 7. If a geneticist knew (1) a woman's genotype for a particular gene and (2) the allelic relationships for the gene, i.e., dominance, incomplete dominance, codominance, then the geneticist could determine a. her phenotype b. her daughter's phenotype c. her mother's phenotype d. all of the above e. none of the above 8. A paternity case involves an infant with type O blood. Four men claim to be the father. You be the judge, as far as the genetic evidence allows. a. The man with type A blood could not be the father. b. The man with type AB blood could not be the father. c. The man with type O blood could not be the father. d. The man with type B blood could not be the father. e. All four men could be the father |
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