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the claim

Identical twins have completely identical DNA.

the verdict
CONTESTED PARTIAL
Recorded sources
1 source for · 3 against

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

Is it true that identical twins have completely identical DNA?

Partly. One DNA-fingerprinting study reports monozygotic twins share identical banding patterns at the loci tested, while other sources note that identical twins differ epigenetically and phenotypically despite sharing the same DNA. None of the retrieved items directly compares the full DNA sequences of twin pairs, so the claim of completely identical DNA is only partially addressed.

Verdict: CONTESTED PARTIAL · 1 source for, 3 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 1
[Multi-locus DNA fingerprints using oligonucleotide probe (CAC)5/(GTG)5 in the Chinese population].
1992
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[Multi-locus DNA fingerprints using oligonucleotide probe (CAC)5/(GTG)5 in the Chinese population].. (1992). pubmed.ncbi.nlm.nih.gov. https://pubmed.ncbi.nlm.nih.gov/1642498

Evidence against · 3
DNA of identical twins
2019
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DNA of identical twins. (2019). biology.stackexchange.com. https://biology.stackexchange.com/questions/80508/dna-of-identical-twins

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More against · 2
Brief Report: Identical Male Twins Concordant for Asperger's Disorder
2007
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Michiko, I. & Hiroshi, K. (2007). Brief Report: Identical Male Twins Concordant for Asperger's Disorder. eric.ed.gov. https://doi.org/10.1007/s10803-006-0150-x

New insights into the (epi)genetics of twinning
2023
Get citation
Dongen, J. v., Hubers, N., & Boomsma, D. (2023). New insights into the (epi)genetics of twinning. doi.org. https://doi.org/10.1093/humrep/dead131

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