Aperson with a genotype of hbss has sickle cell disease. a person with a genotype of hbas allele carries the sickle cell trait. a person with a genotype of hbaa does not have sickle cell disease and does not carry the trait. the punnett square shows the genotype of two people carrying the sickle cell trait. hb a s a aa as s as ss what are the chances that their offspring will have sickle cell anemia? 0% 25% 50% 100%