Cystic fibrosis is caused by an autosomal recessive allele (n). The allele for the normal condition is dominant (N). Two parents appear normal, but the mate has a brother withcystic fibrosis. Which of the following tools will BEST help this family predid their chances of carrying and passing this disease to their offspring?a test Crossa pedigreeO hydrolysisOPunnet SquareBackNexdAll PreviousType here to searchti