1. Genetic Disorders
... resulting in this disorder. There are more than 6000 known single-gene disorders. Sometimes mental retardation is caused by a combination of genetic problems and evnironmental factors. This is called multifactorial disorder. Their inheritance patterns are usually complex because not only does the presence of heredity matters, but also the environmental factors. Weight, height, fingerprint patterns, eye color ... or translocations often result in disease. Although they are considered genetic disorders, they are not necessarily inherited, for in most cases each of the parent's gene is nor...
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- Grade Level: Undergraduate