Quiz 1 - Blackboard Quiz#1 with answers explained 1...

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Blackboard Quiz #1 with answers explained 1. Antibiotics are becoming increasingly ineffective against bacteria because: A) Antibiotics induce mutations that confer resistance B) Larger doses of antibiotics need to be prescribed C) Patients need to take antibiotics more frequently D) Historical antibiotic use selected for resistant strains E) Antibiotic strength is impaired by environmental toxins Mutations occur at random. They are NOT induced by antibiotics. Antibiotics are becoming increasingly ineffective because the use of antibiotics in previous bacterial generations selected for strains in which mutations for resistance were already present. See p. 461 of your textbook. 2. Suppose you sample a population of cockroaches and find that 16% are heterozygous at a particular locus. What would be the frequency of the dominant allele in the population? A) 40% B) 16% C) 44% D) 60% E) Cannot be determined from the information provided. Assuming HWE, 2pq=0.16 and pq=0.08. No matter what numbers you
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This note was uploaded on 12/12/2010 for the course BISC 120 taught by Professor Webb,wetzer,? during the Fall '07 term at USC.

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Quiz 1 - Blackboard Quiz#1 with answers explained 1...

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