How can dominant-lethal alleles be passed down? (choose the best answer! ) a. they can’t, as they are lethal. b. they can be passed down if the individual with the lethal mutation lives to reproductive age and has a child. c. dominant-lethal alleles occur solely through spontaneous mutations, they are not passed down through generations. d. they can be passed down if the individual freezes their eggs or sperm to allow a child to be born with their genetics, even after they pass.