You detect high expression of L1 RNA in cancer cells, and want to determine the genomic location of the L1 element that is being highly expressed. Explain why this might be possible for an “evolutionarily old” L1 element, but quite difficult (or impossible) for an “evolutionarily young” L1 element.

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L1 RNA comprises approximately 17 of the human genome The majority of L1 in the human genome are inactive however about 80100 have retained the abilit... View the full answer