In 1858, Albrecht von Grafe was first described usher syndrome, but he named after Charles Usher who had disorders and believed that condition was inherited or passed from parents to their children.
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people with ushers syndrome will have a normal life expectancy
Usher syndrome is a rare inherited disorder primarily characterized by deafness due to an impaired ability of the auditory nerves to transmit sensory input to the brain(sensorineual hearing loss) accompanied by retinitis pigmentosa, a disorder that causes progressive loss of vision.Researchers have identified three types of Usher syndrome and debated the existence of a fourth type. The age at which the disorder appears along with the severity of symptoms distinguishes the different types of Usher syndrome. Usher syndrome is inherited as an autosomal recessive genetic trait. The possible fourth type of Usher syndrome may be inherited as an X-linked genetic trait.source: WEBMD
Usher syndrome is a relatively rare genetic disorder caused by a mutation. The gene is not carried on one of the sex chromosomes (X or Y).
Usher syndrome is inherited as an autosomal recessive trait. The term autosomal means that the mutated gene is not located on either of the chromosomes that determine a person's sex; in other words, both males and females can have the disorder and can pass along the disorder to a child. The word recessive means that to have Usher syndrome, an individual must receive a mutated form of the Usher syndrome gene from each parent. If a child has a mutation in one Usher syndrome gene but the other gene is normal, he or she is predicted to have normal vision and hearing. Individuals with a mutation in a gene that can cause an autosomal recessive disorder are called carriers, because they "carry" the gene with a mutation but show no symptoms of the disorder. If both parents are carriers of a mutated gene for Usher syndrome, they will have a one-in-four chance of having a child with Usher syndrome with each birth.
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Jacob's Syndrome, or XYY Syndrome was first discovered by cytogeneticists Joe Hin Tjio and Albert Levan.
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