probset06 - Problem Set 6, Fall, 2010 Name: 8 points total...

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Problem Set 6, Fall, 2010 Name: 8 points total 1. You have recently discovered a new species of poisonous chimpanzees,  M. tuae . Some of the  individuals are hyperactive and run into tree branches at a high frequency.  This tendency toward  hyperactivity and tree branch collisions is determined by a single locus, hyper ( hp ). To study the  genetic basis of this hyperactivity, you perform genetic crosses between mutant and wild type and  get the following results:        hp / hp  female  x  +/+ male ---> all hyperactive chimps     +/+ female  x   hp / hp  male ---> no hyperactive chimps      hp /+ female  x   hp /+ male ---> hyper:normal in a 1:1 ratio a. If hyper is fully recessive, how do you explain these results?  b. What mode of inheritance does this represent? 2. While on a quest, you come across two pure-breeding strains of dragons, one with green scales with jagged edges and the other with purple scales with smooth edges. You notice that the dragons have offspring, all but one of which have green scales and jagged edges. The one unique offspring is mostly green with jagged scales but also has a small spot where the scales are purple and smooth. a. Please provide the genotypes of the parents and the F1 offspring b. Assuming the genes are linked, are the mutations in cis or trans in the F1 offspring? c. Draw out a mitotic recombination event that could account for the anomalous offspring with the green, jagged scales and a spot with purple smooth scales. 1
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Problem Set 6, Fall, 2010 Name: 8 points total 3. In a new species of monkeys, called R. robertsae , you wish to map three genes. Mutations in f causes monkeys to swing fast, b causes blue fur instead of white and l causes large eyebrows instead of small. Each of these mutations is recessive. Triply heterozygous females are crossed
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This note was uploaded on 07/01/2011 for the course L 311 taught by Professor Forrester during the Fall '10 term at Indiana State University .

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probset06 - Problem Set 6, Fall, 2010 Name: 8 points total...

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