an impairment of health or a condition of abnormal functioning

an inherited disease controlled by a single pair of genes

an inherited disease controlled by several genes at once

an inherited skeletal disorder beginning before birth; cartilage is converted to bone resulting in dwarfism

a rare inherited disorder of fat metabolism; characterized by severe deficiency of beta-lipoproteins and abnormal red blood cells (acanthocytes) and abnormally low cholesterol levels

any of a number of diseases in which an inherited defect (usually a missing or inadequate enzyme) results in an abnormality of metabolism