Carcass data were obtained on 305 steers and 320 heifers from 7 biological types of dams categorized as British (BR), large dairy (LD), continental (CN), small dairy by British (SDBR), large dairy by British (LDBR), large dairy by Continental (LDCN) and British by Continental (BRCN). All dams were bred to Angus sires for first calving and to a Simmental sire for second and third calving. Progeny of Angus sires were slaughtered at 10 mm backfat thickness evaluated ultrasonically and those of the Simmental sire at 7 mm. One side of each carcass was cut into 8 wholesale cuts. Steers had significantly heavier slaughter and carcass weight (P<.001), higher forequarter %, chuck %, and lower loin % and higher-priced cuts % (HPC %) than heifers (P<.01). Progeny of the larger mature body size dams had heavier slaughter and carcass weights and tended to reach the end point of finish later in age than those from smaller size dams. Progeny of the CN dams had higher hip % and estimated retail yield %, and lowest flank % than those of the SDBR dam group. Progeny of the BR, CN and BRCN dam groups had significantly (P<.001) higher HPC % and hindquarter, and lower plate % than those of the SDBR and LD dam groups when making comparisons at a constant fat thickness of 7.8 mm in the Simmental sired data, but there were no differences (P>.05) among those of the 7 groups at a constant fat thickness of 10.7 mm in the Angus sired data.