Which of the following statements about twin studies of behavioral genetics is true?
a) Monozygotic twins are genetically identical.
b) Dizygotic twins are genetically identical.
c) Fraternal twins are genetically identical.
d) The epigenetic characteristics of identical twins are identical.
Ans: a) Monozygotic twins are genetically identical.
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Which of the following is not being mapped in the brain with recently developed technology, such as PET and MRI?
a) Self-transcendence, an adaptive characteristic in aging b) Processing centers in the brain for negative and positive emotion c) Brain regions important for forming the sense of self d) Brain regions that dictate our political affiliations
The arrival of a(n)____ causes synaptic vesicles to be released from their protein anchors, allowing the vesicles to fuse with the cell membrane and release ____ into the synaptic cleft
a. action potential; neurotransmitters b. neurotransmitter; an electrical charge c. action potential; an electrical charge d. neurotransmitter; more neurotransmitters