When Comparing the Sequences of a Homologous Gene in Four

question 33

Multiple Choice

When comparing the sequences of a homologous gene in four different species,one pair of species shows a 1% difference,whereas the other pair shows a 3% difference.Which pair diverged longer ago from their common ancestor and why?

• A)The pair with a 1% difference;a smaller difference (1% instead of 3%)indicates that there has been less time to accumulate mutations.
• B)The pair with a 1% difference;a smaller difference (1% instead of 3%)indicates that there has been more time to accumulate mutations.
• C)The pair with a 3% difference;A larger difference (3% instead of 1%)indicates that there has been less time to accumulate mutations.
• D)The pair with a 3% difference;A larger difference (3% instead of 1%)indicates that there has been more time to accumulate mutations.