Cystic fibrosis, a disease that causes an accumulation of mucus in the lungs, results when a person is homozygous recessive for the autosomal trait (ff). if two parents who do not have cystic fibrosis give birth to a baby with cystic fibrosis, what are the parents’ genotypes? 1)ff, ff 2)ff, ff 3)ff, ff 4)ff, ff

#1 is the answer since there's a 25% chance that they will have a baby with Cystic fibrosis all the other answers would cause the baby to not have it or for the parents to have it.

science-ocean floors and habitats study guide by volleyballqueen3817 a major advance in ocean-floor mapping. list four sections of the ocean floor. algae that use sunlight to produce their own food through photosynthesis. all of the feeding relationships that exist in a habitat. drying out, predators, find food.