What do we use to cut dna into fragments for genetic engineering and dna fingerprinting?

All cells use the same genetic code. This is why genes from one organism can work in another organism, making genetic engineering possible. Enzymes are needed to cut and join DNA: restriction enzymes are needed to cut and join DNA at particular places to leave sticky ends.

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a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves