1. At about 8 months of age, infants across the world start to ________ strangers; as adults, they prefer the company of those whose attributes are ________ to their own.
A) fear; similar
B) enjoy; different
C) fear; different
D) enjoy; similar
2. The study of the relative power and limits of genetic and environmental influences on behavior is known as
A) molecular genetics.
B) epigenetics.
C) behavior genetics.
D) genome research.
3. A behavior geneticist would be most interested in studying hereditary influences on
A) skin color.
B) sexual anatomy.
C) physical attractiveness.
D) personality traits.
4. Every nongenetic influence, from prenatal nutrition to the people and things around us, is an aspect of our
A) temperament.
B) genome.
C) environment.
D) heritability.
5. The impact of our cultural backgrounds on the development of our personal values best illustrates the influence of
A) temperament.
B) epigenetic marks.
C) heritability.
D) the environment.
6. A human sperm cell contains
A) 23 chromosomes.
B) 23 genes.
C) 46 chromosomes.
D) 46 genes.
7. Chromosomes are threadlike structures made of
A) serotonin molecules.
B) epigenetic molecules.
C) DNA molecules.
D) dizygotic molecules.
8. Chromosomes are contained within
A) brain cells.
B) sperm cells.
C) blood cells.
D) all of these types of cells.
9. DNA is a complex
A) sex hormone.
B) genome.
C) molecule.
D) epigenetic mark.
10. The biochemical units of heredity that make up the chromosomes are called
A) genes.
B) embryos.
C) epigenetic molecules.
D) neurotransmitters.
Answer Key
1. A
2. C
3. D
4. C
5. D
6. A
7. C
8. D
9. C
10. A
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