DNA detectives
The scene of the crime: your kitchen. Time: 8:30 PM. Clue: a hair.
Who stole the last cookie? It was you, wasn't it? Admit it! Your
DNA doesn't lie.
The variations in the genetic composition of living things help
people resolve all kinds of mysteries. Detectives use DNA
to identify criminals, anthropologists use it to understand human migration across the centuries, botanists use it to establish the differences between various species of plants, and conservationists use it to try to preserve endangered species.
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 DNA
autoradiogram.
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