How does the ras gene convert from a proto-oncogene to an oncogene?
a. Designating a chromosome that has a piece of one chromosome fused to a piece of another chromosome
b. Duplicating a small piece of a chromosome, repeatedly making numerous copies
c. Altering one or more nucleotide base pairs
d. Promoting proliferation of growth signals by impairing tumor-suppressor genes
Answer: c. Altering one or more nucleotide base pairs
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