<unk>  are a group of autosomal recessive genetic<unk> . They are caused due to pathogenic mutations in at least 13 different PEX genes that encode peroxins. It affects the peroxisomes, which are organelles in the body that are meant to breakdown items like acids and toxic compounds. Both parents will have to have the recessive gene for the child to show symptoms. If one parent has the gene and the other one does not, the child will be a carrier and will not show symptoms. Any mutation involving the genes that create or work the peroxisomes can lead to the development of any of the<unk> . Both genders have an equal chance to end up with these<unk> .
Zellweger spectrum disorders
Zellweger syndrome
Asperger syndrome
Autism spectrum
Multiple complex developmental disorder
Rett syndrome
Trichothiodystrophy
Fragile X syndrome