EE Chapter 4: Molecular Homology

Question 1

To date, how many DNA genetic codes have been found?

1. 1
2. 8
3. 10
4. 18
5. 25

Answer 1

18

Question 2

Differences between species in the same gene can be used to calculate how long ago they shared a common ancestor. This phenomenon is called

1. genetic divergence rates
2. evolutionary history
3. molecular clock
4. a genetic timeline

Answer 2

3. molecular clock