Sperm can be separated by nonlethal methods in a sorting track that into cubicles having different cubicle characteristics. A test sample of sperm from selected cubicles can be sacrificed to determine their prevalent genetic characteristics. The visually identifiable characteristics of sperm from the test samples can also be correlated with prevalent genetic characteristics. A living sperm, sharing selected genetic characteristics, can be selected from remaining sperm having similar identifiable characteristics in a respective cubicle and used for fertilizing an egg.
