Journal
BMC BIOLOGY
Volume 15, Issue -, Pages -Publisher
BIOMED CENTRAL LTD
DOI: 10.1186/s12915-017-0460-9
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Funding
- NSERC grant [GLDSU447989]
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The idea that much of our genome is irrelevant to fitness-is not the product of positive natural selection at the organismal level-remains viable. Claims to the contrary, and specifically that the notion of junk DNA should be abandoned, are based on conflating meanings of the word function. Recent estimates suggest that perhaps 90% of our DNA, though biochemically active, does not contribute to fitness in any sequence-dependent way, and possibly in no way at all. Comparisons to vertebrates with much larger and smaller genomes (the lungfish and the pufferfish) strongly align with such a conclusion, as they have done for the last half-century.
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