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Chromosomes consist of large,
double-stranded molecules of:

deoxyribonucleic acid.
ribonucleic acid.
autosomal genes.
recombination genes.

Which of the following is NOT one of
the many ways that genes can affect behavior?

Genes may affect neurotransmitter
levels or receptors.
Genes can act indirectly by making it
more likely you will be raised in a particular environment.
Genes themselves cause behavior
without any influence of the environment.
Genes produce proteins that may make
it more likely for a person to become addicted.

Nerves from the central nervous system
convey information to the muscles and glands by way of the:

autonomic nervous system.
somatic nervous system.
sympathetic nervous system.
parasympathetic nervous system.

When researchers try to estimate the heritability of a
human behavior, what are the main kinds of individuals they consider?

Twins and adopted children
People from non-western cultures
Newborns and infants
Uneducated people living in educated

The sweat glands, adrenal glands, and
muscles that constrict blood vessels have input from only the ____ nervous

dorsal root

The temporal lobe of the cerebral
cortex is the primary target for which kind of sensory information?

somatosensory, including touch
the simplest aspects of vision

Suppose a virus damaged only the
dorsal roots of the spinal cord, but not the ventral roots. What would
happen to the sensory and motor abilities of the affected area?

Loss of sensation, but preserved
motor control
Loss of both sensation and motor
Loss of motor control, but preserved
Unaffected sensation and motor

Units of heredity that maintain their
structural identity from one generation to another are:

nucleic acids.

Color vision deficiency is more common
in males than in females because it is controlled by a:

sex-limited gene.
Y-linked gene.
dominant X-linked gene.
recessive X-linked gene.

The central nervous system is composed

the brain and spinal cord.
all the nerves outside the brain and
spinal cord.
the sympathetic and parasympathetic
nervous systems.
the somatic and autonomic nervous

Almost all humans have 23 pairs of
which of the following?


In one family, all three children are
homozygous for a recessive gene. What can be concluded about the parents?

Each parent is also homozygous for
the recessive gene.
Each parent is heterozygous.
One parent is homozygous for the
dominant gene; the other is homozygous for the recessive gene.
Each parent is either homozygous for
the recessive gene or heterozygous.

If the spinal cord is cut at a given
segment, the brain loses sensation at:

that segment only.
that segment and all segments above
that segment and all segments below
all other segments.

Changes in single genes are called:


Cortical blindness may result from the
destruction of:

any part of the cortex.
the occipital cortex.
the parietal cortex.
the central sulcus.

Damage to the ____ often causes people
to lose their social inhibitions and to ignore the rules of polite

corpus callosum
prefrontal cortex
striate cortex

If a trait has high heritability:

hereditary differences account for
none of the observed variations in that characteristic within that
the environment cannot influence that
it is still possible for the
environment to influence that trait.
the trait is not influenced by

If a person has difficulty determining
which of two rhythms is faster, it is likely that she suffered damage to


Recessive genes manifest their effects
only when the individual is ____ for them.

sex limited
homo sapien

An impairment of eating, drinking,
temperature regulation, or sexual behavior suggests possible damage to
which brain structure?


Researchers have found specific genes linked to
certain specific behaviors.

True b.

parasympathetic nervous system activates the “fight or flight”

True b. False

A strand
of DNA serves as a template (model) for the synthesis of RNA molecules.

True b. False

A tract
in the spinal cord would most likely be found in the white matter.

True b. False

limbic system is important for motivation and emotional behaviors.

True b. False

What are
the four lobes of the brain? What is each lobe responsible for?

makes a behavior hereditary? What factors influence the heritability of

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