Which of the following is the best example of genetic drift?
A. A 'two-tail' mutation spreads through a mouse population, even though it does not affect reproductive fitness.
B. A 'two-tail' mutation that does not affect reproductive fitness disappears and reappears occasionally in a mouse population.
C. A 'two-tail' mutation in mice makes them more likely to find mates, and the mutation spreads through the population.
D. A 'two-tail' mutation in mice makes them less likely to find mates, and the mutation does not spread.
Answer: A
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Alicia and Kenny are fraternal twins. Patty and Penelope are sisters born four years apart. Which of these two pairs of siblings is most similar genetically?
A) Alicia and Kenny, the fraternal twins, are most similar genetically. B) Patty and Penelope, the sisters, are most similar genetically. C) The fraternal twins and the sisters are equal in genetic similarity. D) The degree of similarity cannot be determined without DNA testing.
__________ is the most common reason young infants cry
A) Fear B) Pain C) Overstimulation D) Hunger
What benefit(s) does acetaminophen have over aspirin?
a) Aspirin causes gastric irritation; acetaminophen does not b) Acetaminophen reduces inflammation; aspirin does not. c) Aspirin can damage the liver; acetaminophen does not. d) Acetaminophen reduces fever; aspirin does not.
The use of dogs and cats in psychological research:
a. is very common, especially in research investigating drug effects on sleep. b. is prohibited by the American Psychological Association and the Association for Psychological Science. c. was outlawed in the United States in 1953 when the first chapter of the Society for the Prevention of Cruelty to Animals opened in Vermont. d. is rare.