Which of the following is correct regarding chromosomes?
A. Down syndrome results when chromosome 21 is present in triplicate instead of as the usual pair.
B. At conception, the fertilized embryo has 48 chromosomes, 24 from the female egg and 24 from the male sperm.
C. The mother of an embryo always contributes a Y chromosome and the father always contributes an X chromosome.
D. Chromosomes have no relationship to deoxyribonucleic acid (DNA).
Answer: A
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An in-depth study of one or more individuals is:
a. laboratory observation. b. naturalistic observation. c. a survey. d. a case study.
Children who have a small head size, facial and heart defects, lower intelligence, problems in learning, memory, hyperactivity, impulsivity, and communication and social skills may have been prenatally exposed to
a. caffeine. b. lead. c. alcohol. d. nicotine.
Lobotomies and deep lesioning are examples of
a. ECT. b. psychosurgeries. c. REBT. d. pharmacotherapy.
Which discipline technique is most likely to result in a child showing higher rates of emotional and social problems than other children?
A. corporal punishment B. redirection C. inductive discipline D. reinforcement