Genetics
An autosomal study in 2011 found an average Northwest African influence of about 17% in Canary Islanders with a wide interindividual variation ranging from 0% to 96%. According to the authors, the substantial Northwest African ancestry found for Canary Islanders supports that, despite the aggressive conquest by the Spanish in the 15th century and the subsequent immigration, genetic footprints of the first settlers of the Canary Islands persist in the current inhabitants. Paralleling mtDNA findings (50.1% of U6 and 10.83% of L haplogroups), the largest average Northwest African contribution (42.50%) was found for the samples from La Gomera. According to Flores et al. (2003), genetic drift could be responsible for the contrasting difference in Northwest African ancestry detected with maternal (51% of Northwest African lineages) and paternal markers (0.3–10% of Northwest African lineages) in La Gomera. Alternatively, it could reflect the dramatic way the island was conquered, producing the strongest sexual asymmetry in the archipelago.
Read more about this topic: La Gomera