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Submission + - Mammalian genomes are shrinking (

mmmscience writes: Unlike their leafy and hairless counterparts, mammals have contracting genomes. It is due to a lack of new transposable elements, those lovable jumping genes that viruses dump into the genomic code. While a human's DNA is still made up of 45% of transposable elements, they are mostly very old. Natural selection has seen mammals incorporate fewer new transposable elements than plants and nonmammals.
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Mammalian genomes are shrinking

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When you are working hard, get up and retch every so often.