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.
By Dr Ananya Mandal, MD. Dermatomyositis is an inflammatory condition characterized by muscle weakness and a skin rash. Although the disease primarily affects the muscles and skin, it is a systemic condition and can also involve the lungs, joints, esophagus and sometimes the heart.he skin rash seen in dermatomyositis usually develops on the face, eyelids and around the knuckles, elbows, knees, back and chest. The rash is dusky red or violet in colour, sometimes with a bluish discoloration.