Genetic and chromosomal disorders are-
(i) Autosomal disorders: Autosomal recessive genetic disorders are phenylketonuria and dominant genetic disorders are Huntington’s disease. Children with phenylketonuria cannot digest phenylalanine. Huntington’s disorder causes mental and neurological impairment in children.
(ii) Sex Linked Disorders: Sex linked disorders are red-green color blindness, hemophilia, fragile X syndrome, autism etc.
(iii) Trisomy: Trisomy disorder is Down syndrome. It causes complications in the child’s eyes, face and cheeks.