Exam1_PracticeProblems

Exam1_PracticeProblems - BLY302 FALL 2010 - PRACTICE...

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BLY302 – FALL 2010 - PRACTICE PROBLEMS FOR EXAM 1 1. Honey bees have a haplo-diploid sex determination system where females develop from a fertilized egg (they are diploid, having one allele from the female queen and 1 allele from the male) and males develop from unfertilized eggs (they are haploid, having only 1 allele from the queen). What is the probability that a daughter will inherit a particular allele from her mother? What is the probability that a son will inherit a particular allele from his mother? 2. Two gene loci, A and B , are unlinked (and thus assort independently), and alleles A and B are dominant over alleles a and b . Indicate the probabilities of producing the following. a. An AB gamete from an AaBb individual? b. An AB gamete from an AABb individual? c. An AABB zygote from a cross AaBb × AaBb ? d. An AB phenotype from a cross AaBb × AaBb ? 3. The red kernel color in wheat is caused by the presence of at least one dominant allele from each of two independently segregating gene pairs (e.g.,
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Exam1_PracticeProblems - BLY302 FALL 2010 - PRACTICE...

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