Parishes in Louisiana. Louisiana is divided into 64 parishes, in the same way that 48 of the other states of the U.S. are divided into counties (Alaska is divided into boroughs and census areas). Types of local government. Parishes: Parishes are Louisiana's equivalent to counties in most states.
The types of tests and how they work are reviewed in the following links: 1  The Genetics of Prader-Willi Syndrome: An Explanation for the Rest of Us. 2  Gene Tests-Gene Clinics: Prader-Willi Syndrome has lots of fairly academic information on inheritance, genes, genetic testing, and prenatal testing.
Most cases of Prader-Willi syndrome are not inherited, particularly those caused by a deletion in the paternal chromosome 15 or by maternal uniparental disomy.arely, a genetic change responsible for Prader-Willi syndrome can be inherited. For example, it is possible for a genetic change that abnormally inactivates genes on the paternal chromosome 15 to be passed from one generation to the next.