Sickle-cell anemia is a genetic disorder of the blood in which the shape of red blood cells is distorted, resulting in a variety of health problems. the allele for normal blood cell production (h) is dominant to the allele for sickle cell production (h). if one parent has sickle-cell anemia and the other parent is a carrier, what is the probability that their child will have sickle-cell anemia? a. 100% b. 50% c. 75% d. 25% punnet square h h h ? ? h ? ?

haploid cells;

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.