exam1 - Student name _ AGR 3303 - Genetics 2 Oct 2000...

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Student name ____________________________ AGR 3303 - Genetics 2 Oct 2000 University of Florida - Fort Lauderdale Exam #1: PARTICULATE GENETICS Multiple choice (75 pts.) Please read these carefully. One and only one response (a, b, c, d, or e) completely and correctly answers the question, or completes the statement. Circle the appropriate response and turn in this exam. Make sure your circle is unambiguous. Take time to relax. (Suggestion: put the problem into gene symbols, if that helps you to visualize the problem and its solution.) 1. Compare these two of Mendel's postulates: segregation vs. independent assortment. a. Segregation involves longitudinal division while independent assortment involves reductional division. b. Mendel observed the chromosomal basis for segregation, but could not see the basis for independent assortment. c. Both segregation and independent assortment involve unit factors in the cells d. Both segregation and independent assortment require two or more genes. e. Either segregation or independent assortment result in a 9:3:3:1 phenotypic ratio. 2. A single gene has three alleles. In a diploid organism, how many possible genotypes are there involving this gene? a. 3 b. 4 c. 6 d. 8 e. 9 3. Two genes each have two alleles. In a diploid organism, how many possible genotypes are there? a. 3 b. 4 c. 6 d. 8 e. 9 4. Two genes each have two alleles, one dominant and the other recessive. In a diploid organism, what is the maximum possible number of phenotypes ? a. 3 b. 4 c. 6 d. 8 e. 9
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Genetics - AGR 3303, University of Florida at Fort Lauderdale, 2 Oct 2000 Page 2 5. Green colorblindness in humans is a sex-linked recessive trait. In a family, the daughter has normal vision, whereas the son is colorblind. One can realistically surmise: a. the mother was heterozygous for colorblindness b. the father was heterozygous for colorblindness c. the father was homozygous for color blindness d. the mother most probably was colorblind e. the father most probably was colorblind 6. The idea of unit factors of inheritances was not obvious because: a. the religious view of fixity of species would not allow it b. early plant breeders were not systematic in their recordkeeping c. "The Origin of Species" by Darwin had not yet been published d. DNA had not been discovered e. early plant breeders did not make as many hybrids as Mendel 7. Which human blood phenotypes are always associated with phenotypically homogeneous (all the same) offspring? a. Mother A mates with father O
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exam1 - Student name _ AGR 3303 - Genetics 2 Oct 2000...

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