How Does the DNA of Related Organisms Show Similarity

Question

How does the DNA of related organisms show similarity?
A) The DNA of each organism is unique and therefore shows no similarity.
B) The diverse types of sugars and phosphates are very similar.
C) The sequence of bases is very similar.
D) The locations of DNA within the cell are very similar.

Accepted Answer

The sequence of bases (adenine, guanine, cytosine, and thymine) in DNA determines the genetic information of an organism. If two organisms have a similar DNA sequence, it suggests that they are closely related in terms of their evolutionary history. Therefore, the similarity in the DNA sequence provides evidence of their relationship.