List the 3 Parts of the Modern Cell Theory.

1. All living things are composed of cells.

2. Cells are the basic units of structure and function for living things.

3. All cells come from pre-existing cells.

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.