2153_Fall_2010_EXAM_I_2_key

2153_Fall_2010_EXAM_I_2_key - BIOL 2153 Fall 2010 EXAM I#2...

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BIOL 2153 Fall 2010 EXAM I#2 Prof. Smith 1 Name (print) ______________________________ Signature ________________________________ Use the following information and chi-square table to answer the next 4 questions. Two genes control color in gecko lizards as follows: G-B- geckos are brown, G-bb are green, ggB- are black, and ggbb are white. A green gecko was mated to a black gecko, and a large number of F1 progeny were obtained, all of which were brown. When two F1 progeny were mated they produced: 80 brown geckos, 40 green, 20 black, and 20 white. 1) What are the genotypes of the F1 geckos? a. GgBb and GgBb b. GgBb and GgBB c. ggBb and GGBb d. GGbb and ggBB e. Too little information to know 2) What are the genotypes of the parents? a. GgBb and GgBb b. GgBb and GgBB c. ggBb and GGBb d. GGbb and ggBB e. Too little information to know 3) The chi-square value and degrees of freedom are: a. 8.9, 4 b. 8.9, 3 c. 40, 2 d. 40, 1 e. none of these 4) Do the observed results differ significantly from what was expected, assuming independent assortment is occurring? a. Yes b. No
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BIOL 2153 Fall 2010 EXAM I#2 Prof. Smith 2 5) What was the key(s) to Mendel’s experiments? a. He analyzed discrete traits b. He used pure-breeding lines c. He performed reciprocal crosses d. all of the above e. b and c 6) Mendel observed that male and female gametes contributed equally to the genetic material of offspring. Which theory did this observation disprove? a. Blended inheritance b. Homonculus c. Artificial selection d. Law of segregation e. Law of independent assortment 7) Hemochromatosis is a recessive genetic disorder that interferes with the body's ability to metabolize iron. A man and woman who are both carriers of the disorder have a son. What is the probability that their unborn child will also be a carrier? a. 100%
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This note was uploaded on 02/03/2011 for the course BIOL 2153 taught by Professor Larkin during the Fall '03 term at LSU.

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2153_Fall_2010_EXAM_I_2_key - BIOL 2153 Fall 2010 EXAM I#2...

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