Polygenic traits are those that are:
A) developed during adolescence.
B) transmitted by the mother.
C) uncommon in humans.
D) determined by several pairs of genes.
D
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How many different facial expressions convey the intensity of anger?
a) 10 b) 20 c) 30 d) 60
Which of the following statements about stepfamilies is TRUE?
A) Stepfathers more than stepmothers have greater difficulty parenting their stepchildren than their biological children. B) Noncustodial fathers stay more involved in their children's lives than noncustodial mothers do. C) Girls' adjustment problems to stepparents are more negative and last longer than do boys' adjustment problems. D) all of the above
A sperm cell and an ovum each contribute 23, rather than 46, chromosomes to a zygote because they
A. were produced through the process of meiosis. B. were produced through the process of mitosis. C. have undergone the process of crossing over. D. have undergone the process of canalization.
Two cars collide at a red light. An eyewitness to the incident is later asked by a police officer how fast the vehicles were traveling when they “tapped” each other. You’d expect that the eyewitness’s memory would ______.
a. be biased to say the cars were traveling slower than they actually were b. be biased to say the cares were traveling faster than they actually were c. be biased to say that no accident occurred at all d. remember the event with complete accuracy