Inside a skeletal muscle cell, a set of small cylinders called are assembled into larger cylinders called .

Inside a skeletal muscle cell, a set of small cylinders called myofibrils are assembled into larger cylinders called intercalated disks.

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.