What is the difference between rough endoplasmic reticulum and smooth endoplasmic reticulum?

The key difference between the smooth endoplasmic reticulum and rough endoplasmic reticulum is that the smooth endoplasmic reticulum does not contain ribosomes on its surface while rough endoplasmic reticulum has ribosomes on its surface.

Explanation:credit : wiki

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.