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" In a wild-type strain of Drosophila the size of a gene from the start to...

" In a wild-type strain of Drosophila the size of a gene from the start to stop codon is calculated to be 2000 nucleotide pairs. However, the size of the mRNA molecule transcribed from this gene is estimated at 1200 nucleotides. The most likely explanation for this discrepancy in size would invoke the existence of"

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The most likely explanation for this discrepancy in size would invoke the existence of introns which are removed during RNA splicing.

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