What is the term that describes an individual who expresses a specific phenotype or disease?

Jonah and Jana are siblings. Jonah has the genetic disorder cystic fibrosis, caused by inheriting two mutant alleles of the CFTR gene (the gene that when mutant causes cystic fibrosis) - one allele was inherited from each parent. Jana does not have cystic fibrosis. Which of the following statements is/are true? Jana does not have the CFTR gene. Jana has two copies of the CFTR gene. Jana has at least one copy of the non-mutant allele of the CFTR gene. Jana has two copies of the mutant allele of the CFTR gene.