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Transcript
Quiz 3 (9 points), February 6, 2003
Name_________________________
NATS 104, Animal Sexual Behavior
Section M (33)___ T (34)___ W (35)___
1. Which factor(s) below can cause populations to evolve (circle all that apply)? (1)
A. MUTATION
B. NON-RANDOM MATING
C. GENE FLOW
D. GENETIC DRIFT
E. NATURAL SELECTION
ALL OF ABOVE ARE TRUE.
2. Use the words in a-e from question 1 to fill in the blanks (3):
a. MUTATION is the original source of genetic variation within populations.
b. NATURAL SELECTION is a process by which individuals with particular heritable
characters survive and reproduce at a higher rate than other individuals in a population.
c. GENETIC DRIFT is a random process that is most influential in small populations.
3. Two populations of a species that are found in neighboring locations with different
environments are observed to become genetically more similar over time. Which evolutionary
mechanism is the most likely cause of this trend? (1)
A. GENE FLOW
b. nonrandom mating
c. natural selection
d. genetic drift
4. Which of the following terms describes the situation in which individuals within a subset of a
population are more likely to mate with each other than with individuals from the population at
large? (1)
a. gene flow
b. genetic drift
C. NONRANDOM MATING
d. random mating
5) What organisms are antibiotics meant to kill?_BACTERIA (1)
6) What is meant by “the crisis in antibiotic resistance”? (1)
BACTERIA ARE BECOMING RESISTANT TO ANTIOBIOTICS, IN SOME
CASES TO MULTIPLE ANTIBIOTICS. THIS MEANS THAT HUMANS ARE IN A
CRISIS BECAUSE WE HAVE FEWER WAYS TO FIGHT DISEASES CAUSED BY
BACTERIA THAT HAVE BECOME RESISTANT.
7) Why would one want to calculate changes in gene frequency using the Hardy-Weinberg
equation? (1)
TO DETERMINE IF EVOLUTION IS OCCURING/HAS OCCURED IN A POPULATION.