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DNA carries instructions for making the proteins a cell needs. DNA molecules are found in chromosomes. Genes are segments of DNA that contain instructions that code for proteins.
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How can DNA be used to help solve a crime?
Investigators can create a DNA profile from evidence such as blood, bone, hair, or other tissue and compare it with a suspect’s profile. Because each person’s DNA is unique, a match can help identify someone involved in a crime, including in old cases.
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