DNA is called into chromosomes in a cells

DNA is molecules are packed in thread like structures which are called chromosomes

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Explanation:

what have fossils ever done for you

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."