DNA repair defect is seen in:

Ans. (a) Xeroderma pigmentosumRef: Harper's Biochemistry, 30th ed. pg. 389-90, 28th ed.pg. 330-32* Xeroderma pigmentosum is an autosomal recessive genetic disease which arises due to defect in DNA repair particularly of thymidine dimers.Examples of Conditions Arising due to DNA Repair Defects:* Xeroderma pigmentosa* Ataxia telangiectasia* Fanconi's syndrome* Bloom syndrome* HNPCC