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Explain why most of the pieces of DNA that are amplified in a PCR reaction are...

Explain why most of the pieces of DNA that are amplified in a PCR reaction are of the same length.

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The DNA amplified in the PCR has same length. Because the forward and reverse primer has specific sequence at which they bind. They always bind to these specific sequences. The DNA amplification occurs between the region of forward and reverse primer binding sites. That's why the same sequence is obtained.

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