Definition. Sex-linked diseases are passed down through families through one of the X or Y chromosomes. X and Y are sex chromosomes. Dominant inheritance occurs when an abnormal gene from one parent causes disease even though the matching gene from the other parent is normal.The abnormal gene dominates.efinition. Sex-linked diseases are passed down through families through one of the X or Y chromosomes. X and Y are sex chromosomes. Dominant inheritance occurs when an abnormal gene from one parent causes disease even though the matching gene from the other parent is normal.
Savant syndrome is a rare syndrome in which people with poor mental development or brain injury possess extraordinary mental skills which are difficult to explain scientifically. Sometimes the talents of a savant may go unnoticed.he exact cause of a savant syndrome is not known. A lot of hypotheses have been proposed. Some researchers believe that there is damage to the left hemisphere of brain, which results in compensatory changes in the right side of brain.
Savant syndrome is a rare but spectacular condition in which persons with developmental disabilities, including but not limited to autism, or other central nervous system (CNS) disorders or disease have some spectacular âislands of geniusâ that stand in jarring juxtaposition to overall limitations.t is over 200 years ago since the first case of savant syndrome appeared in a scientific journal in Germany, and it is 125 years since Dr. J. Langdon Down first described savant syndrome as a distinct condition.