Humans have 23 pairs of chromosomes, and chimps have 24 pairs of chromosomes. What is the most likely explanation for these differences in human and chimp genomes? a. The common ancestor of humans and chimps had 24 pairs of chromosomes. During human evolution, two human chromosomes fused end to end. b. In the evolution of chimps, new adaptations resulted from additional chromosomal material. c. At some point in evolution, human and chimp ancestors reproduced with each other. d. Errors in mitosis resulted in an additional pair of chromosomes in chimps.

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23-08-2022
Biology

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Humans have 23 pairs of chromosomes, and chimps have 24 pairs of chromosomes. What is the most likely explanation for these differences in human and chimp genomes? a. The common ancestor of humans and chimps had 24 pairs of chromosomes. During human evolution, two human chromosomes fused end to end. b. In the evolution of chimps, new adaptations resulted from additional chromosomal material. c. At some point in evolution, human and chimp ancestors reproduced with each other. d. Errors in mitosis resulted in an additional pair of chromosomes in chimps.

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nikitarahangdaleVT nikitarahangdaleVT · Answer 1 · 2022-08-29T20:23:17+02:00

The most likely explanation for this phenomenon is that the common ancestor of humans and chimps had 24 chromosomes but during the course of evolution, two human chromosomes fused end to end. So the correct option is A.

What is the relationship between humans and chimps?

Humans and chimps have a DNA which is so similar because these two species are really closely related. The species like Humans, chimps and bonobos have descended from a common ancestor species which lived on earth six or seven million years ago.

Since humans and chimps have gradually evolved from a common ancestor their DNA also passed from generation to generation and thus underwent some changes.

Therefore, these DNA changes are what led to differences between humans and chimps.

Therefore the correct option A.

Read more about common ancestors, here

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