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.
The character Dory, from the movie Finding Nemo, shows severe short term memory loss. The celebrity and actor Michael J. Fox has been diagnosed with Parkinson's disease. In the movie Memento (film), the main character, Leonard Shelby, has a short term memory condition in which he can't form new memories. The character Savant (comics), a member of the DC Comics superhero team the Birds of Prey (comics), exhibits both photographic and non-linear memory as a result of what is described only as a chemical imbalance.