Relative effects of maternal and pup hereditary on postnatal mouse development

This study was designed to assess the separate effects of inbreeding the mother and the pups on behavioral development in the mouse. The pups were tested on a standardized developmental rating scale at 32 days gestational age. The results indicated that maternal inbreeding retarded developmental by 1.5 days and that inbreeding the pups retarded development by .7 days.