New studies indicate that humans and chimps are most different (about 6.4%)in what genetic variable?

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Copy number variation refers to the number of copies of certain genes that can vary between individuals or species. Studies indicate that humans and chimps are most different in copy number variation, with variations detected in over 2300 genes. While differences in base-pair sequence, insertions and deletions, and proteins also contribute to the genetic differences between humans and chimps, copy number variation shows the greatest disparity.

New Studies Indicate That Humans and Chimps Are Most Different