Cystic fibrosis is inherited in an autosomal recessive pattern. males who have cystic fibrosis are usually sterile. furthermore, the disease is often lethal before the age of reproduction. even though people with the disease rarely reproduce, cases continue to arise because (see book section: module 9.9)
a. new mutations continually introduce this harmful condition into the populationb. the harmful allele "hides" inside heterozygous individuals and one-fourth of the offspring of two heterozygotes should be afflictedc. mosquitoes can transfer the disease from person to person
d. people continue to make inappropriate lifestyle choices