Claims

Basques have the world's highest Rh-negative blood frequency (~25-35%)

Unproven What these labels mean →

Basques have the world's highest Rh-negative blood-type frequency, at roughly 25-35%.

Evidence

RelationRecordNote
none found—no serology-literature URL cited in the card
none found—Closed 2026-10-08 without a library or paywall pull. What was checked: Split 2026-10-04: the gene-frequency part (>50%) is Documented on “Basques have an RH-negative gene frequency above 50%”. Still needed here: verbatim 'world's highest' wording and a stated Rh-negative PHENOTYPE percentage (~25-35%). Cavalli-Sforza 1994 search-inside showed only gene frequency (p. 132) and 'local high frequency of RH-negatives' (p. 280). Do NOT derive 0.511² ≈ 26% (Hardy-Weinberg). Book pull: full p. 132 sentence, p. 280 passage.

Sources

SourceRelationAt
Basques and Atlantis (Why Files 2026)reports

Ties

ToRoleYearsVerdictSource
Basques have an RH-negative gene frequency above 50%sourced gene-frequency partStructural

Tied from

FromRoleYearsVerdictSource
Basques have an RH-negative gene frequency above 50%narrower sourced partStructural

Mentioned in

Claim

Basques have the world's highest Rh-negative blood-type frequency, at roughly 25-35%.