Human and Chimpanzee Genomes Share 96% DNA Sequence Identity

question 47

Multiple Choice

Human and chimpanzee genomes share 96% DNA sequence identity. What most likely causes humans to be phenotypically distinct from chimpanzees?

• A) the presence of many new genes unique to humans
• B) a much larger human genome compared to the chimpanzee genome
• C) the loss of higher functioning genes in chimpanzees
• D) dramatic changes in chromosome structure and organization in humans
• E) subtle mutations in protein coding sequences and changes in regulatory units of human genes

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