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Generally speaking, Prader-Willi Syndrome is not inherited. It is a random error/mutation to the 15th chromosome that occurs at conception. In around 70% of the cases, the mutation is a deletion (or microdeletion) of some of the genes on the 15th chromosome. In around 25% of the cases the error/mutation occurs because the baby gets 2 15th chromosomes from the mom instead of one from mom and one from dad, and since the genes that impact the symptoms of PWS should come from the dad if the child has 2 sets from the mom the genes are silent and therefore it is the same as though they were missing/deleted. In the rarest of cases PWS is caused by an imprinting error which can either occur randomly at conception or be passed from the father (who would not have PWS himself)....again this last kind is extremely rare.
See Sources and Related Links for the Prader-Willi Syndrome Association (USA) and more detailed information.
What else can I help you with?
Is down's syndrome inherited?
Most cases of down syndrome are not inherited. Translocation Down syndrome can be inherited.
Can Turner Syndrome be inherited?
Turner syndrome can rarely be inherited
Is Turner syndrome inherited?
It is not, the women affected by it cannot have their own children, so the syndrome is not inherited.
Lesh-nyhan syndrome how does it inherited?
Lesh-Nyhan syndrome is inherited as a sex-linked recessive disorder.
Will your children get marfan syndrome if you have it?
Yes, because this syndrome is inherited.
How is alfies syndrome inherited?
sporadic!
How is Alfi's syndrome inherited?
sporadic!
Is turner syndrome inheritable or random?
Turner syndrome is usually random and not inherited. It occurs when a female is born with a missing or incomplete X chromosome. In rare cases, Turner syndrome can be inherited if one parent carries a chromosomal abnormality.
Is Asperger syndrome inherited?
It's genetics.
Is myelodysplastic syndrome inherited?
I don't believe that is inherited because it is a form of cancer. We all know cancer is not inherited.
Is it inherited or obtained from environmental factors fetal alcohol syndrome?
Yes it is often inherited.
How is inheritance syndrome inherited?
Inheritance syndrome is typically inherited in an autosomal dominant pattern, meaning that a mutation in one copy of the affected gene is enough to cause the syndrome. This means that an affected individual has a 50% chance of passing the syndrome on to their offspring. Rarely, inheritance syndrome can also be inherited in an autosomal recessive or X-linked pattern.
