"DNA fingerprinting" is a recently introduced biochemical procedure that uses a pattern derived from a person's genet...

on September 8, 2022

Why is C correct?

Isn't it obvious that some people groups share genetic characteristics? How would stating something so obvious harm the case for DNA fingerprinting?

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Emil on November 28 at 08:59PM

Hi, let's say that 1 million people all have the same genetic marker. If the fingerprint looks for this marker, the results are no longer unique, like a fingerprint. Rather, they are looking at only one part of the fingerprint that may be shared by millions of people. This would not be a random error, which the passage tells us would not be an issue, but rather one caused by the fact that the thing we are treating as unique is not actually unique.