Dominant alleles are so called because under most circumstances they ________
A) code for genes that are never considered lethal
B) suppress the expression of other alleles
C) code for desired traits only
D) code for most phenotypic and genotypic expressions of a trait
B
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Regions of the CNS with an abundance of myelinated axons constitute the ________ matter
A) gray B) white C) neural D) brain E) ganglion
Muscle fibers are basically a collection of
A) synapses. B) muscles. C) sarcomeres. D) connective tissue fibers.
In the process of digestion, most nutrient absorption takes place in the
A) small intestine. B) stomach. C) large intestine. D) duodenum. E) liver.
The left optic tract contains axons from
A. the right half of the left retina and the left half of the right retina. B. the left half of the left retina and the right half of the right retina. C. the left half of each retina. D. the right half of each retina.