Answer :
Final answer:
Mark and Chloe's DNA is 0.1% different. This small percentage creates the variations we see between individuals.
Explanation:
In terms of DNA similarities and differences, humans share around 99.9% of their genetic code with each other. This means that Mark and Chloe's DNA would be about 0.1% different. This percentage of difference contributes to all the variation we see between individuals in terms of appearance, physiological traits, and even susceptibility to diseases.
Learn more about DNA differences here:
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