Exam _1 Key - NAME_KEY_ STUDENT ID #_ SECTION #_ TA_...

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NAME_________ KEY __________________ STUDENT ID #___________________ SECTION #_________________________ TA_____________________________ Academic Honesty/Integrity “I have neither given nor received aid during the administration of this exam.” ___________________________________ (Signature) ______________________________________________________________________ Biology 302 – Exam #1. October 7, 2011 True or False Questions (2 points each) ( CIRCLE ONE ): 1. In the Avery-Macleod-McCarty experiment, the transforming activity in S cells was destroyed by treatment with RNase. ( TRUE or FALSE ). 2. The copying process in which a single DNA molecule gives rise to two identical molecules is called replication. ( TRUE or FALSE ). 3. The three-dimensional structure of DNA, as proposed in 1953, was elegant however it did not provide clues to the manner in which DNA copies itself. ( TRUE or FALSE ). 4. Most traits are affected by environmental factors as well as genes. ( TRUE or FALSE ). 5. Pairing between A (adenine) and T (thymine) in a duplex molecule of DNA is accomplished by a covalent bond. ( TRUE or FALSE ). 6. Pairing between A (adenine) and T (thymine) is weaker than pairing between C (cytosine) and G (guanine) because A-T are attracted by two rather than three bonds. ( TRUE or FALSE ). 7. Gel electrophoresis takes advantage of the fact that DNA is positively charged. ( TRUE or FALSE ). 8. Many alleles can exist within a population for a given locus, however only one allele can be present at the locus of a gene in any single chromosome. ( TRUE or FALSE ). 9. PCR is an example of a tandem repeat polymorphism. ( TRUE or FALSE ). 10. True-breeding means that plants (for instance) produce only progeny like themselves when allowed to self-pollinate normally. ( TRUE or FALSE ).
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11. The principle of segregation predicts that a heterozygous parent will produce gametes of each allele in roughly equal proportions. ( TRUE or FALSE ). 12. The genotypic ratios of a dihybrid cross with independent assortment are 9:3:3:1. ( TRUE or FALSE ). 13. Consaguiniuty is the presence of a mating event between relatives. ( TRUE or FALSE ). 14. Codominance is when the phenotype of a heterozygous individual is intermediate
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Exam _1 Key - NAME_KEY_ STUDENT ID #_ SECTION #_ TA_...

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