It's a gene mutation. And it is different for each organ.
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There is no single type of mutation that causes Hemophilia A. It is not the type of mutation but rather the location of the mutation within the genetic code.
Deletion Mutation causes DiGeorges Syndrome.
A frameshift mutation in the CARD15 gene
deletion
Bipolar disorder affects men and women equally and usually appears between the ages of 15 and 25. The exact cause is unknown, but it occurs more often in relatives of people with bipolar disorder.
Unknown at this time.
The mutation that causes Autism is a rare genetic mutation. There are three different genes that are linked to the cause of different disorders on the Autism Spectrum.
leukemia
Missense
Leukemia subleukemic, leukemia (lkē`mēə), cancerous disorder of the ... type of RNA virus that, unlike other RNA viruses, reproduces by transcribing itself into DNA. ... discovered new links between leukemia cells and cells involved.
Periodic or cyclic neutropenia is a disorder which causes frequent infections. This condition in which neutrophils, a type of white blood cell, decrease on a regular basis is extremely rare and has been shown to be a genetic mutation.