<prompt> Chromosomes involved in early onset Alzheimers disease:1,14,211,13,223, 14, 203, 14, X  <response>: A i.e. 1,14,21Ref: Genetic Home ReferenceExplanation:Genes Involved in Alzheimers Disease:Early onset Alzehimers disease involves three genes: APP-Ch 21.PSEN1 Presenilin 1 - Ch 14.PSEN 2 Presenilin 2 - Ch 1.Genes causing autosomal dominant AD APP PSEN1 PSEN 2All can cause early onset disease but PSEN2 is associated with a broad range of onset ages.Susceptibitity genes Apolipoprotein E gene APOE- c2 allele: associated with decreased risk- s3 allele: neutral- e4 allele: high-risk SORL1 