Although single gene pairs sometimes play a crucial role in development, more commonly the influence of genes is a consequence of __________, the interaction of multiple genes rather than just one
a) polygenic inheritance
b) incomplete dominance
c) dominant–recessive inheritance
d) phenotypes
Answer: a
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Researchers who counted the number of synapses in the brains of individuals who were autopsied after death found that __________.
A. the visual, auditory, and prefrontal cortex reached a peak at the same age B. the visual, auditory, and prefrontal cortex reached a peak at different ages C. the prefrontal cortex reached a peak first, followed by the visual and auditory areas D. the visual, auditory, and prefrontal cortex all reached a peak in adulthood
Why is it inaccurate and poor scientific judgment to make conclusions based on case studies?
A. Case studies can provide little information about a disorder. B. Few patients are willing to be used as case studies. C. It is unethical. D. Conclusions based on so little data are likely to be flawed.
In using time sampling to gain a representative sample of behavior, the intervals in which the observations are to be made should be selected
A. economically. B. only randomly. C. only systematically. D. either randomly or systematically, or both.
The male produces sperm in the __________, two glands located in the __________
A) penis; scrotum B) scrotum; penis C) testes; penis D) testes; scrotum