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Prelim Answer Key - 2005

Prelim Answer Key - 2005 - NAME LAB DAY_TA NAME(S ANIMAL...

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NAME_________________________________________________________________ LAB DAY ____________________TA NAME(S)______________________________ ANIMAL SCIENCE 221 2nd Prelim April 2005 BEFORE YOU START: Read the questions carefully. Make sure you use clear gene and genotype symbols. Make sure your answers give all that the question asked for. There are 5 pages of questions plus Table 7.1—make sure you have them all. SECTION POSSIBLE ACTUAL 1 9 ________ 2 21 ________ TOTAL 30 ________
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NAME_______________________________________________________________ 2 Part 1: Each question is worth 1.5 points. 1. The Hardy-Weinberg Law states that large, random-mating populations will remain in equilibrium from one generation to the next if there are no forces acting to change gene frequencies. List the three forces that could change gene frequency. __ Mutation _________________ __ Migration ________________ __ Selection _________________ 2. The different between the breeding values of individuals with the BB and Bb genotypes is the same as the difference between the breeding values of the Bb and bb genotype. This constant difference infers a value to the “ B” allele. The difference in genotypes described above is referred to as: Average effect of a gene substitution 3. Two progeny test programs for the detection of undesirable recessive alleles are sire-daughter mating
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