My friend has Friedrich's ataxia.
His sister is getting married. What are the chances that
his sister's children will have the disease. Is the gene
a recessive gene? Can one find this information through
some sort of DNA testing? How sure can a doctor be with
his answer if he is allowed to perform all the necessary
tests? Please mail all the answers to lhs at iucaa.ernet.in.
I am not a biologist so please try and answer the questions
in a laymans language.