Quiz109 - General Genetics 3100:211 Fall, 2009 "Quiz...

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General Genetics 3100:211 Fall, 2009 “Quiz 1” ID__________________ Form A 1. Which of the following sets of parents and offspring would not be expected from crosses with two alleles at a single locus? The dominant allele is black and the recessive allele is brown. a. Two black parents with all black offspring b. Two brown parents with all brown offspring c. One black and one brown parent with equal numbers of black and brown offspring d. Two brown parents with mostly brown offspring (75%) but some black (25%) e. All of the above would be expected 2. From the dihybrid cross AaBb X AaBB, what proportion of the offspring will have the dominant phenotype at both loci? 3. In humans, a dimple on the chin is an autosomal recessive characteristic. A man without a chin dimple whose father had a chin dimple marries a woman with a chin dimple whose mother lacked the dimple. What proportion of their children would be expected to have a chin dimple? 4. When does chromosome replication occur during the cell cycle?
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Quiz109 - General Genetics 3100:211 Fall, 2009 "Quiz...

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