Comparative Genomics as Biochemical Evidence

Question 1

What is comparative genomics?

Answer 1

Is the comparison of genome sequences of different species.

Question 2

How are new genes gained?

Answer 2

Mutations.

Question 3

How are new genes lost?

Answer 3

Natural selection and genetic drift.

Question 4

How can DNA be used as evidence?

Answer 4

1. The more similarities in the DNA code between two species, the more closely related they are.
2. The more differences in the DNA code between two species, the more distantly related they are.

Question 5

What other sections of DNA can be used as a source of comparison?

Answer 5

Non-coding regions called Junk DNA.

Question 6

Does junk DNA have a function?

Answer 6

No.