<p>Numbers and crosses from indicated dam and sire genotypes.</p>

Numbers in the topmost Table are from McNairn et al., Nature, (2019): specifically, offspring of dams homozygous for Chaos3 are taken from from “Table S3 Aggregate of crosses” from that publication, and offspring of heterozygous dams are from “Extended Data Table” from that same publication. p-values for the bottom 4 crosses were calculated using the Χ2 probability test for the total number of pups. C3, Chaos3; Gt, gene trap allele of Mcm2. (XLSX)