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NEET2010ZoologyPrinciples of Inheritance and VariationActual

Which of the following disorders are caused due to recessive autosomal mutations?

Options

  1. ATurner's syndrome and sickle cell anaemia
  2. BEdward's syndrome and Down's syndrome
  3. CCystic fibrosis and phenylketonuria
  4. DAlzheimer's disease and Huntington's chorea

Correct answer

C. Cystic fibrosis and phenylketonuria

Step-by-step solution

Gene related human disorders are determined by mutations in single gene. They are transmitted to the offspring as per Mendelian principles. The pattern of inheritance of such Mendelian disorders can be traced in a family by the pedigree analysis. Cystic fibrosis is an abnormal recessive disorder of infants, children and young adults that is due to an abnormal recessive autosomal allele present on chromosome 7 . In 70 % of cases, it is due to deletion of three bases. The disease gets its name from the fibrous cysts

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