In order for a child to inherit a recessive genetic disease like sickle cell anemia, healthy parents must both a. have the disease. b. be homozygous for the mutated gene that causes the disease. c. be carriers of the mutated gene that causes the disease. d. have other offspring that have the disease

What is the main difference between the central nervous system (cns) and the peripheral nervous system (pns)? .the cns involves the brain and spinal cord, and the pns involves the body nerves. the cns involves the body nerves, and the pns involves the brain and spinal cord. the cns involves sensory neurons, and the pns involves motor neurons. the cns involves motor neurons, and the pns involves sensory neurons.