Biologists now routinely test for homology among potentially related species using DNA sequences.These tests reveal if the sequences from each species _____.
A)are related by descent from a common ancestor
B)are related because of convergent evolution
C)are related by chance mutations
D)code for identical proteins
E)code for identical RNAs

Question

Quizplus · Accepted Answer

Testing for homology among DNA sequences can reveal if the sequences are related by descent from a common ancestor. This is because species that are closely related evolutionarily are expected to share more similarities in their DNA sequences compared to species that are more distantly related. Convergent evolution, chance mutations, identical proteins, and identical RNAs do not necessarily imply evolutionary relatedness.

Biologists Now Routinely Test for Homology Among Potentially Related Species