Variation Within and Between Groups of Genetically Identical Nuclear Transfer Brangus Bulls and Steers for Growth Measures Taken Over Time11This work represents a portion of the M.S. thesis of the senior author and was supported, in part, by funding from the Texas State Line Item for Efficient Production of Beef and the J. W. Thornton Endowment. Assistance of K. E. Hamlin and L. L. Keeton in data procurement is gratefully acknowledged.