A scientist doing a dihybrid cross breeds fruit flies and makes a Punnett square to predict the offspring phenotypes. That phenotypes occur in a very different proportion than the Punnett square predicted. Why could this be?

What is the significance of the protein-lined pits? a. protein attracts other proteins needed for atp synthesis within the cell. b. protein-lined pits are able to transport one molecule at a time down the concentration gradient within the cell. c. the polarity of proteins allows other polar molecules to attach and be transported in the cell by transport channels. d. receptors within the pits allow ligands to fuse and be transported into the cell by endocytosis.