MICHAEL GILBERT / SCIENCE PHOTO LIBRARY MICHAEL GILBERT / SCIENCE PHOTO LIBRARY
Paternity testing by analysis of DNA fingerprints. Top left: DNA fingerprints of mother (green), child (red), & potential father (blue). Top right: the mother's DNA bands are identified in the child's DNA fingerprint; the remaining bands in the child's fingerprint must come from the father. Bottom left: these remaining bands in the child's fingerprint match up with bands in the DNA fingerprint of the real father; paternity is proved. Bottom right: the child's remaining bands do not match up with bands in the alleged father's fingerprint; paternity is disproved.
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