Biotechnology

AP Biology· difficulty 3/5

DNA from a crime scene (CS) and three suspects (S1, S2, S3) was analyzed at one VNTR locus. Bands of various sizes appear on the gel.

Whose DNA matches the crime scene sample?

Explanation

Both bands of S2 align at the same vertical positions (sizes) as the crime-scene bands; S1 and S3 show different band positions.

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