A healthy twenty-seven-year-old female presents to the physician for genetic counseling with her husband. They would like to become pregnant in the near future, but they have concerns that their offspring may develop cystic fibrosis. The wife’s sister has cystic fibrosis, an autosomal recessive disorder with an incidence of approximately 1 in 90,000. The husband’s history is noncontributory.

A healthy twenty-seven-year-old female presents to the physician for genetic counseling with her husband. They would like to become pregnant in the near future, but they have concerns that their offspring may develop cystic fibrosis. The wife’s sister has cystic fibrosis, an autosomal recessive disorder with an incidence of approximately 1 in 90,000. The husband’s history is noncontributory. what is the probability of the couple having an affected child?

If a healthy young couple are both carriers of cystic fibrosis, the chance that their future child will have this serious illness isMultiple Choice0%.25%.75%.50%.100%.

If both the mother and the father are carriers for the cystic fibrosis gene, what are the chances that their child will be a cystic fibrosis carrier?

If a couple that are both heterozygous carriers of the cystic fibrosis allele have children, the chance that both their first and their second child are carriers is 0.5 x 0.5, or 25%, as determined by theMultiple choice question.

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%