Why do Rh-negative but not Rh-positive mothers sometimes have babies with hemolytic disease of the newborn? A) This disease results vwhen an Rh-negative mather's immune system is primed to prnduce anti-Rh IgG antibodies that can cross the placenta. If the mother is Rh-positive, she won't produce any anti-Rh antibadies at all. B Rh-positive mothers produce igM anribody, not igG. Even aithough they make anti-Rh antihody, IgM antibody can't cross the placenta, so it can't cause hemolytic disease of the newiborn. C) Rh-positive mothers will recelve a preventative shot from their physiclan prior to conception. This will provide the protection the ftetus needs AFTER conception to avold the disease. DJ Rh-negativity is also associated with hyperproduction of antlibodles. As such, Rh-negative mothers are more likely than Rh-positive mothers to produce the antibodles needed to produce this disease. E) This disease results when an Rh-positive mother's immune system is primed to produce anti-Rh igG antibodies that can cross the placenta. In the mother is Rh-negative, she won't produce any anti-Rh antioodies at al. Question 55 DNA vaccines work by A) stimulating production of antibodies against DNA. B) stimulating interferon production. C) inactivating the host DNA. D) having the cell use the introduced DNA to make the microbial protein antigen. E) having the cell use the introduced DNA to make inactivating microbial MRNA. O B Question 58 Attenuated agents are A) dead viruses. B) toxins. C) weakened but replicating microbes. D) parts of an organism. E) weakened, nonreplicating microbes. O B