The followig respresent a disease casued in inheritance of a sex linked recessive trait?

a) down's syndrome b) cystic fibrosis c)hunington's disease d) phenylketonuria(pku disease) e)none

The followig respresent a disease casued in inheritance of a sex linked recessive trait?
The answer is e. The rest are not sex-linked, caused by mutations or error is chromosomal serparation, like trisomy (as in the case of down's syndrome).
Reply:i know that it is not a b or d but i don't know about c...
Reply:none.down's syndrome is by trisomy of the autosome 21. huntingtons is an autosomal dominant disease.. pku is also an autosomal recessive inborn error of metabolism of chr 11.i think. cystic fibrosis is also an autosomal recessive disorder.
Reply:(e) none





Down's syndrome is caused by nondisjunction and is not inherited.





Cystic fibrosis and PKU are autosomal recessive diseases.





Huntington's disease is an autosomal dominant disease.