Based on King and Wilson's findings of the similarities in the genomes of chimps and humans as well as genome sequencing studies that have found that all of our genes are present in chimpanzees, what do researchers now think is driving the most significant evolution along the hominin lineage?

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Researchers now believe that changes in gene regulation, rather than an increase or decrease in gene number or loss of mitochondrial DNA, drove the most significant evolution along the hominin lineage. This is based on the similarities in the genomes of chimps and humans and the fact that all of our genes are present in chimpanzees.

Based on King and Wilson's Findings of the Similarities in the Genomes