A human genetic disease caused by a sex-linked recessive allele resulting in the absence of one or more blood-clotting proteins, and characterized by excessive bleeding following injury.Group of answer choicessickle-cell diseasehemophiliaDown syndromeTay-Sachs diseaseDuchenne muscular dystrophyHuntington’s diseaseNext

A human genetic disease caused by a sex-linked recessive allele and characterized by progressive weakening and a loss of muscle tissue.Group of answer choicesTay-Sachs diseaseDuchenne muscular dystrophyHuntington’s diseasesickle-cell diseaseDown syndromehemophiliaNext

A recessively inherited human blood disorder in which a single nucleotide change in the α-globin gene causes hemoglobin to aggregate, changing red blood cell shape and causing multiple symptoms.Group of answer choicessickle-cell diseaseHuntington’s diseasecystic fibrosisTay-Sachs diseaseNext

A human genetic disease caused by a dominant allele; characterized by uncontrollable body movements and degeneration of the nervous system; usually fatal 10 to 20 years after the onset of symptoms.Group of answer choicessickle-cell diseaseHuntington’s diseasecystic fibrosisTay-Sachs disease

A human genetic disease usually caused by the presence of an extra chromosome 21; characterized by developmental delays and heart and other defects that are generally treatable or non-life-threatening.Group of answer choicesHuntington’s diseasehemophiliasickle-cell diseaseTay-Sachs diseaseDown syndromeDuchenne muscular dystrophyNext

A human genetic disorder caused by a recessive allele for a chloride channel protein; characterized by an excessive secretion of mucus and consequent vulnerability to infection; fatal if untreated.Group of answer choicessickle-cell diseasecystic fibrosisTay-Sachs diseaseHuntington’s diseaseNext