Which can be directly attributed to a single-gene disorder?

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Cystic fibrosis is a single-gene disorder inherited as an autosomal recessive trait,and neurofibromatosis is a single-gene disorder inherited as an autosomal dominant trait.Cleft lip is classified as a multifactorial disorder in which a genetic susceptibility and appropriate environment appear to play important roles.Turner and Klinefelter syndromes are disorders of sex chromosome number.

Which Can Be Directly Attributed to a Single-Gene Disorder