What is a mutation? A mutation is any change in the DNA sequence. There are three types of mutations: * addition: One or more nucleotide base pairs are inserted into a DNA sequence (also called frameshift mutation) *deletion: The removal of one or more nucleotides in a DNA sequence (also called frameshift mutation) *substitution: A mutation that exchanges one or more bases for another (also called point mutation) How do they occur & why? Mutations for randomly, but different mutations occur different ways. Most of the time a mutation comes from radiation (so like the sun, X-rays, tanning salons, etc). Some mutations can be genetic though, like autism. Autism is caused when theres an extra chromosome. Another common mutation would be cancer. Cancer occurs when cells uncontrollably grow, and don't die. Can it be prevented? Unfortunately, mutations are random. The best way to prevent them is to protect yoursel...
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