Data collected on weight, feed consumption, and daily gain of 66 steers and 121 bulls were studied by analyses of variance, covariance, correlation, and partial regression. The bulls were of Hereford, Angus, and Shorthorn breeds, and the steers were the offspring of fast and slow gaining bulls that were progeny tested. The feeding tests for the bulls were from 112 to 170 days, and for the steers, approximately 200 days. The bulls and steers were on full feed for the test period, and all animals were fed individually. The first four groups were hand fed and the remaining groups were self fed. / Master of Science