Which of the following statements is part of the cell theory?
all cells come from pre-existing cells.
all living things are made up of one or more cells.
cells are the basic units of living things.
all of these

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.