Animal Breeders Co-op purchased a promising bull that might be a carrier of the osteopetrosis (marble bone disease) gene. The bull is mated to a herd of cows where 1% of all cows are carriers of the o. a. 1% of the offspring are expected to be carriers of the osteopetrosis gene. b. 50% of the offspring are expected to be carriers of the osteopetrosis gene. c. 99% of the offspring are expected to be carriers of the osteopetrosis gene. d. None of the offspring are expected to be carriers of the osteopetrosis gene.