Question

Cystic fibrosis is a condition that affects mucus. Mucus is a jelly-like substancethat certain cells produce to protect the body from infection. Humans with cysticfibrosis produce mucus that is thicker and stickier than usual. This sticky mucusbuilds 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 cysticfibrosis, and the allele f is for having cystic fibrosis.Jason, a human from this group, does not have cystic fibrosis. Jason has one allele for nothaving cystic fibrosis and one allele for having cystic fibrosis.Based on this information, click the blue words to correct any errors in the text.Jason is homozygous for the cystic fibrosis gene.Jason does not have cystic fibrosis. This is Jason's phenotype for the cysticfibrosis trait.Jason's phenotype for the cystic fibrosis gene is FF.

Answer 1

Jason does not have cystic fibrosis but is a carrier of the disease as his genotype is heterozygous (Ff), meaning he has one normal and one mutated allele for the CFTR gene.

Step-by-step explanation:

Cystic fibrosis is an autosomal recessive genetic disease that causes the production of abnormally thick and sticky mucus, which can lead to serious health problems such as recurrent respiratory infections and malabsorption of nutrients. Jason, a human mentioned in the question, does not have cystic fibrosis. Since he carries one normal allele for the CFTR protein (F) and one mutant allele for cystic fibrosis (f), Jason's genotype for this trait would be Ff. Therefore, Jason is a carrier of the cystic fibrosis trait but does not show symptoms because it is a recessive condition that requires two mutated alleles for the disease to manifest. As a carrier, Jason is heterozygous, meaning he has two different alleles for a gene (Ff), not homozygous (FF or ff).

Answer 2

Jason carry one allele for not having cyctic fibrosis and one allele for having cyctic fibrosis therefore he is heterozygous for the cystic fibrosis gene.

Jason does not have cystic fibrosis and it is his phenotype (physical expression of the gene) for the trait.

Jason's genotype (set of genes in its DNA) for the cystic fibrosis gene is Ff because he is heterozygous for the gene.