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 diseasesickle-cell diseaseHuntington’s diseasecystic fibrosisNext

Tips1 ptsA 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

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

One type of mutation in the CFTR protein prevents the transport of chloride ions through the channel. What is most likely to be observed in the lungs of patients with this mutation?A. Dehydrated epithelial cellsB. Dehydrated mucusC. Mucus with excess waterD. Mucus with a high electrolyte concentration

Cystic fibrosis is caused by the inheritance of recessive alleles depicted by a lower case ‘c’. Which of the following genotypes would result in an individual being affected by the condition?CFCcCCcc2What is the term for a person who has inherited a recessive allele for a disease, but is not affected by the condition? MutatorCarrierIncubatorMessenger3What is the genotype of a carrier for cystic fibrosis?  CFccCCCc4What percentage of the offspring of two cystic fibrosis carriers are likely to be affected by the condition?50%25%75%100%5The inherited disorder Huntington’s disease is controlled by a dominant allele, H. If one parent has a homozygous dominant genotype, what percentage of the offspring will inherit the condition?100%50%25%75%6If both parents are heterozygous for Huntington’s disease, what percentage of their offspring will inherit the condition?50%75%100%25%

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