When the genetic code (XX or XY) begins to assert itself,
a. genetic activity on the Y sex chromosome causes ovaries to begin to differentiate.
b. genetic activity on the X sex chromosome causes ovaries to begin to differentiate.
c. ovaries begin to differentiate if the Y sex chromosome is absent.
d. testes begin to differentiate if the Y sex chromosome is absent.
c
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The developmental disorder of Down syndrome is predominantly caused by
a. a missing #21 chromosome. b. an extra #21 chromosome. c. genetic splicing and chromosome damage. d. spiral helix ladder random recombination.
______________ are situations in which it is difficult for an individual to decide, either because the right course of action is unclear or it carries some negative consequences.
Fill in the blank(s) with the appropriate word(s).
A medical student wants to be a surgeon. Observing an operation, she focuses her attention on the way her teacher is holding the scalpel and the angle between the blade and the skin. The student's attentional focus is an example of the component known as
a. goal-directed attention. b. stimulus-driven attention. c. invariant perception. d. unconscious inference.
Developmentalists usually categorize labor into ____ stages
a. two b. three c. four d. It depends upon the length of the labor process.