The genotype of an organism is the inherited map it carries within its genetic code. Not all organisms with the same genotype look or act the same way because appearance and behavior are modified by environmental and developmental conditions. Conversely, some phenotypes could be the result of multiple genotypes. 2  The genotype is commonly mixed up with the Phenotype which describes the end result of both the genetic and the environmental factors giving the observed expression (e.g. blue eyes, hair color, or various hereditary diseases).
Symptoms. The most common signs and symptoms of dermatomyositis include: 1  Skin changes. 2  A violet-colored or dusky red rash develops, most commonly on your face and eyelids and on areas around your nails, knuckles, elbows, knees, chest and back. The rash, which can be patchy with bluish-purple discolorations, is often the first sign of dermatomyositis. 2  Muscle weakness. 3  Progressive muscle weakness involves the muscles closest to the trunk, such as those in your hips, thighs, shoulders, upper arms and neck.
What is Myositis? Myositis is a term meaning inflammation in the muscles. There are several types of myositis, the most common being polymyositis and dermatomyositis. Polymyositis causes muscle weakness around the middle of the body and affects both sides of the body. Dermatomyositis causes muscle weakness as well as a skin rash.