Down syndrome is linked to
a. alcohol abuse by the father.
b. abnormalities of the 21st pair of chromosomes.
c. sex-linked chromosomal abnormalities.
d. the teratogenic effects of contracting rubella during pregnancy.
b
Psychology
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By age 3, the brain is about ____ of its adult weight, and by age 6 it is ____
a. 50%; 70% b. 60%; 80% c. 70%; 90% d. 80%; 100%
Psychology
The process in which a learned response that has been extinguished suddenly reappears on its own with no retraining is called ________
a. spontaneous recovery b. generalization c. discrimination d. a reaction formation
Psychology