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the claim

Genome size is roughly the same across all species

the verdict
REFUTED
the evidence says no
Recorded sources
0 sources for · 6 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Genome size varies by orders of magnitude across different species, directly refuting the claim that it is roughly the same.

The analysis

The claim states that genome size is roughly the same across all species. Multiple retrieved papers (such as #7, which notes an 80,000-fold variation, and #8 and #11) explicitly demonstrate massive variation in genome sizes across species. Therefore, the claim is clearly refuted by scientific evidence.

Evidence against · 6
Dynamic changes of genome sizes and gradual gain of cell‐specific distribution of C4 enzymes during C4 evolution in genus Flaveria
Recorded source metadata

Yukimi Y. Taniguchi, U. Gowik, Yuto Kinoshita, Risa Kishizaki, N. Ono, A. Yokota, P. Westhoff, Y. Munekage. Dynamic changes of genome sizes and gradual gain of cell‐specific distribution of C4 enzymes during C4 evolution in genus Flaveria. 2021. https://doi.org/10.1002/tpg2.20095

Demonstrates that genome sizes vary greatly across species within the genus Flaveria.

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More against · 5
Intra- and interspecific variations in genome sizes of Agaricia corals from Curaçao
Recorded source metadata

D. M. L. Rañises, M. J. Gonzalez, Mohammed M. Tawfeeq, F. Gaudray, M. Malay, M. Vermeij, Jean‐François Flot. Intra- and interspecific variations in genome sizes of Agaricia corals from Curaçao. 2023. https://doi.org/10.1101/2023.08.23.554453

Shows interspecific variation in genome sizes among coral species.

Variation across species in the size of the nuclear genome supports the junk-DNA explanation for the C-value paradox.
Recorded source metadata

M Pagel, R A Johnstone. Variation across species in the size of the nuclear genome supports the junk-DNA explanation for the C-value paradox.. 1992. https://doi.org/10.1098/rspb.1992.0093

Notes that the nuclear genome size varies by at least 80,000-fold across eukaryotic species, addressing the C-value paradox.

Variations in genome mass.
Recorded source metadata

S S Wachtel, T R Tiersch. Variations in genome mass.. 1993. https://doi.org/10.1016/0305-0491(93)90360-h

Reports that vertebrate genome sizes range widely from less than 1 pg to over 200 pg.

Genome Size in North American Fireflies: Substantial Variation Likely Driven by Neutral Processes.
Recorded source metadata

Sarah Sander Lower, J Spencer Johnston, Kathrin F Stanger-Hall, Carl E Hjelmen, Shawn J Hanrahan, Katharine Korunes, David Hall. Genome Size in North American Fireflies: Substantial Variation Likely Driven by Neutral Processes.. 2017. https://doi.org/10.1093/gbe/evx097

Documents a greater than 5-fold range of genome sizes across firefly species.

The dynamic ups and downs of genome size evolution in Brassicaceae.
Recorded source metadata

Martin A Lysak, Marcus A Koch, Jeremy M Beaulieu, Armin Meister, Ilia J Leitch. The dynamic ups and downs of genome size evolution in Brassicaceae.. 2009. https://doi.org/10.1093/molbev/msn223

Reports a 16.2-fold variation in genome size across Brassicaceae taxa.

The paper trail · every fact has a biography
first checked31 Jul 2026
judged → REFUTED · 831 Jul 2026
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