Ask a New Question
Menu

A scientist is attempting to build a cladogram that shows the evolutionary closeness of three organisms in relation to humans. After doing DNA analysis, they determine that the organisms share the following percentages of DNA:

Organism A and humans share 85% of their DNA.

Organism B and humans share 80% of their DNA.

Organism C and humans share 90% of their DNA.

Based on this information, which order should they go on the cladogram (from least related to most related)?

(1 point)
Responses

C, B, A, humans
C, B, A, humans

A, B, C, humans
A, B, C, humans

B, A, C, humans

1 answer

Based on the percentages of shared DNA with humans, we can determine the order of the organisms on the cladogram from least related to most related. The closer the percentage of shared DNA to 100%, the more closely related the organisms are to humans.

  • Organism A shares 85% of its DNA with humans.
  • Organism B shares 80% of its DNA with humans.
  • Organism C shares 90% of its DNA with humans.

Ordering them from least to most related to humans gives us:

  1. Organism B (80% shared DNA)
  2. Organism A (85% shared DNA)
  3. Organism C (90% shared DNA)
  4. Humans

Thus, the correct order should be: B, A, C, humans.