In polygenic inheritance, phenotypic characters are

A) determined by a double pair of alleles.
B) determined by interactions among several genes.
C) determined by multiple copies of a single gene.
D) always controlled by genes on the same chromosome.
E) determined by the genes on the Y chromosome.


Answer: B

Anatomy & Physiology

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Indicate whether the statement is true or false

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Movement of particles from higher to lower concentrations through a membrane, such as in dialysis, occurs by _____.

A) diffusion B) active transport C) osmosis D) filtration

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The fulcrum of a lever system is the

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