Which does NOT occur in prophase I of meiosis?
a. cytokinesis
b. formation of groups of four chromatids
c. homologue pairing
d. crossing over
e. condensation of chromatin
ANSWER: a
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About 80% of the alleles present in thoroughbred horses can be dated back to 31 known ancestors from the late eighteenth century. As a result, one would expect _____
A. random mating. B. Hardy-Weinberg equilibrium. C. low rates of mutation. D. many polymorphic alleles. E. little variation in physiology and behavior.
A type of antibody light chain is the ________ chain.
A. omega B. alpha C. lambda D. delta
Some drugs are plant products that can bind neural receptors in a human body because the body makes a similar chemical. Endorphins are the human equivalent of
A) opiates. B) cocaine. C) THC (tetrahydrocannabinol). D) ethanol.
Refer to Figure 10-2. The process occurring at arrow 3 in the associated figure is:
a. fertilization.
b. G1.
c. meiosis.
d. mitosis.
e. fusion.