Question

How does comparing DNA of different species help in tracing evolutionary relationships?

Answer 1

DNA has been an important discovery for many reason, a key one being its relationship to evolutionary theory. Evolutionists have been particularly excited with DNA advances because the basis of DNA is such that it can be utilized to document the history of evolution. By comparing DNA sequences of genes from one organism to another, we can learn an enormous amount about their relationships. Comparing the nucleotide sequences of organisms to check for similarities and differences gives a clue to evolutionary history as organisms closely related will have more or less identical sequences.