Answer :
Final answer:
Mark's and Chloe's DNA is 99.9% different.
Explanation:
Mark's and Chloe's DNA is 99.9% different. DNA fingerprinting methods can identify specific variations in DNA sequences, such as single nucleotide polymorphisms (SNPs) or short tandem repeats (STRs). These variations make each individual's DNA unique, with only a small percentage of genetic material being different between individuals.
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