The smallest unit of genetic materials is called __________
a. A chromatid.
b. DNA
c. a chromosome.
d. a gene.
Answer: D
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a. Social b. Behavioral c. Health d. Human Factors
The correlation between the IQs of biological parents and their offspring is about
.47. For identical twins reared in the same family group, it is (a) zero, because they do not vary at all (b) about the same as that of the parents (c) very high, close to .90 (d) perfect, that is 1.0, otherwise they would not be identical
According to the ________ law, neurons are either on or off.
Fill in the blank(s) with the appropriate word(s).