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.
Not everyone with ASD, of course, will have savant abilities. About one out of 10 people with ASD do. The best explanation of what happens in the brain of a savant (whether congenital or acquired) is this.Damage occurs to the left side of the brain, with higher-level memory circuits also sustaining damage.Parts of the brain that are undamaged are recruited to compensate, as are lower-level memory capacities.e also memorized literally thousands of books, each from reading just once. What all savants have in common is prodigious, almost uncanny memory. This type of memory, while deep, is also narrow, linked solely to their particular ability.