Question

The following image is a pedigree for a family with the genes for cystic fibcrosis which is an autosomal recessive trait. If the dominant allele is represented by A and the recessive allele represented by a what would be a possible genotype and phenotype individual

Answer 1

Genotype = Aa

Phenotype = Healthy (no cystic fibrosis)

Step-by-step explanation:

A person with cystic fibrosis would have the genotype, aa, because it's caused by a recessive allele, meaning both alleles would have to be lower-case for the person to have cystic fibrosis. Therefore, if a person has a dominant allele (A) , they'll have the trait (they may pass it down to their children), but they don't have cystic fibrosis themselves.

Hope that helps!