If a person needs one matching pair of genes in order to express a characteristic carried by a pair of genes, the characteristic is considered
A. recessive.
B. dominant.
C. a mutation.
D. polygenic.
Answer: A
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We wish to test the hypothesis that listening to music while studying improves learning. Random assignment into two groups, one that listens to music and one that studies in silence, controls for
a. the students' inherent academic ability. b. the students' use of different study strategies. c. the amount of sleep students had prior to the experiment. d. all of these.
The formula for the chi-squared statistic is
A) ?[(O–E)2/E] B) [?(O–E)2]/E C) O/[?(O–E)2] D) E/[?(O–E)2]
When Norah's cancer was not detected or contained early, it __________, or moved to other areas of the body.
A. replicated B. migrated C. reproduced D. metastasized
Which of the following is a likely result of restriction of range?
a. The size of the correlation coefficient is reduced. b. The causality between the predictor and outcome variable is reversed. c. The size of the correlation coefficient is increased. d. The direction of the correlation will be reversed.