PALB2 and Alzheimer disease: GnomAD genomes homozygous allele count = 0 is less than 2 for AD/AR gene PALB2, good gnomAD genomes coverage = 30.2. GnomAD exomes homozygous allele count = 0 is less than 2 for AD/AR gene PALB2, good gnomAD exomes coverage = 88.2.