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19) When an extra base has been inserted (added) into a gene, the mutation is particularly...

19) When an extra base has been inserted (added) into a gene, the mutation is particularly harmful because all of the bases (and codons) after the insertion are wrong. This type of mutation is called A. silent B. nonsense C. frameshift D. aneuploidy

20) When a mutation leads to a substitution of a different amino acid within a protein, this is a _________________ mutation. A. nonsense B. missense C. silent D. deletion

21) Which of the following is true about evolution by natural selection? A. The goal of evolution is to arrive at humans. B. When evolution is complete, a perfect species exists C. Heritable traits aid in survival and reproduction. D. An individual organism can change its allelic frequencies within its lifetime.

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gladiator answered 2 years ago
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