Question

this passage describes the cystic fibrosis trait in humans: cystic fibrosis is a condition that affects mucus. mucus is a jelly - like substance that certain cells produce to protect the body from infection. humans with cystic fibrosis produce mucus that is thicker and stickier than usual. this sticky mucus builds up in the lungs and interferes with breathing. in a group of humans, some individuals have cystic fibrosis and others do not. in this group, the gene for the cystic fibrosis trait has two alleles. the allele f is for not having cystic fibrosis, and the allele f is for having cystic fibrosis. malia, a human from this group, has cystic fibrosis. malia has two alleles for having cystic fibrosis. based on this information, what is malias genotype for the cystic fibrosis gene? not having cystic fibrosis ff having cystic fibrosis ff

Explanation:

Since Malia has cystic fibrosis and has two alleles for having cystic fibrosis. The allele for having cystic fibrosis is \(f\). So her genotype must be \(ff\) (homozygous recessive).

Answer:

ff