This study aims to develop predictive equations for muscle and bone indexes using live body weight and to characterize the correlation between body weight, bones morphometrics and carcass characteristics of two sexed broiler strains. Six hundred chicks were reared and distributed into four groups. Carcass traits, bone and breast morphometrics were measured. Pearson correlation calculated among carcass traits, body measurements, breast morphometrics and bone geometrics. Linear regression model calculated to predicting with breast index, tibia seedor index and femur seedor index using live body weight.Main results showed that the strain had an insignificant effect on the tibia and femur traits, while sex had significant effect on most tibia and femur traits. The TSI (Tibia Seedor Index) and FSI (Femur Seedor Index) were higher in males of Ross strain than Cobb males and all females. Shank and keel length were higher in males than females and in Cobb than Ross strain. Sex and strain significantly affected the breast muscle width and circumference of males than females and Ross than Cobb strain, while BI (Breast Index) was insignificant higher for Ross and males than Cobb and females. Carcass results demonstrated that males of Ross always recorded higher values compared to another groups. LBW (Live Body Weight) was significantly positive correlated with drum % in Ross females, dressed weight % in Ross males and high significantly positive with FRI (Femur Robusticity Index) in Cobb males, while it had significantly negative correlation with BI in Ross females and TRI (Tibia Robusticity Index) in Cobb females. The BI, TSI and FSI could be used for predicting carcass quality as well as live body weight in different strains and both sexes.In conclusion, it could be beneficial to raise each sex or strain separately to utilize each alone when its traits correlated or predicted with specific traits. Males of Ross strain showed the preference performance compared to other groups.