Question

When human DNA molecules and chimpanzee DNA molecules are heated to separate the two sides of the molecules from each other and then mixed together at cooler temperatures, strands of human DNA are able to form hydrogen bonds and base-pair with over 98% of the nucleotides in the chimpanzee DNA strands.Which of the following is the most logical conclusion to draw from this information?

• A. Humans evolved from chimpanzees.
• B. Humans and chimpanzees share a relatively recent common ancestor.
• C. Chimpanzees evolved from humans.
• D. Convergent evolution has led to similar nucleotide sequences in the two genomes.

Answer 1

The correct option is B Humans and chimpanzees share a relatively recent common ancestor.

Single stranded DNA from chimpanzee and Human when allowed to combine together, the formation of H${}_2$ bonds or complementary base pairing is over 98%, meaning chimpanzees are closest ancestors to humans

So, the correct answer is 'Humans and chimpanzees share a relatively recent common ancestor'