To Use a Genetic Sequence as a Molecular Clock,the Changes

question 29

Multiple Choice

To use a genetic sequence as a molecular clock,the changes in nucleotides in the sequence must have accumulated at a steady pace over time.Drawing on what you know about codons and redundancy in the genetic code,which type of change would most likely be the type that is useful for a molecular clock?

• A)changes in the first nucleotide pair in the codon
• B)changes in the second nucleotide pair in the codon
• C)changes in the third nucleotide pair in the codon
• D)All of these changes are equally useful for a molecular clock.

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