Cystic fibrosis is a deadly disease of the lungs and digestive system. it is inherited as a recessive trait. how can two healthy parents have a child with cystic fibrosis?

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

can i get the brainliest pls

explanation: