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 choicesTay-Sachs diseasesickle-cell diseaseHuntington’s diseasecystic fibrosisNext

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 choicesTay-Sachs diseasecystic fibrosisHuntington’s diseasesickle-cell disease

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 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 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

An autosomal recessive disorder characterized by an inability to properly break down certain glycolipids. Accumulation of the lipids in brain cells causes progressive nervous system dysfunction and is usually fatal by age four.Group of answer choicesTay-Sachs diseasesickle-cell diseasecystic fibrosisHuntington’s diseaseNext