action_center_3 - Practice Problems Genetics Action Center...

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Practice Problems Genetics Action Center 9/13/11, 9/15/11 1. Mice from wild populations typically have gray-brown (or agouti fur) but a particular strain of mice has yellow fur. If a single yellow male is mated to agouti females, the male sires 40 progeny, 22 with agouti fur and 18 with yellow fur. When the agouti F 1 progeny are crossed, they produce only agouti offspring. When the yellow-furred F 1 progeny are crossed, they produce 30 agouti and 54 yellow progeny. Use a chi square test to examine the hypothesis that the yellow locus is dominant for coat color, but is a recessive lethal. 2. The data set below was taken from a cross from a large family, testing for ability to taste the chemical phenylthilcarbamide (PTC). , Parent 1 Phenotype Parent 2 Phenotype Children Phenotypes Taster non-taster 11 tasters 15 non-tasters a) Perform a chi square analysis to test the hypothesis that one parent is heterozygous and the other parent is homozygous recessive for a single gene locus governing this trait. Is the test as described in class consistent with this hypothesis? b) Suppose the parent’s phenotypes were unknown, but the sibs observed above were
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This note was uploaded on 09/26/2011 for the course BOT 3333 taught by Professor Durica,d during the Fall '08 term at The University of Oklahoma.

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action_center_3 - Practice Problems Genetics Action Center...

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