Which of the following can not be used as specimen for DNA finger printing?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Food from stomach
DNA fingerprinting needs the person’s own cells: blood, hair follicles, skin, bone, saliva or sperm.
Option (1) Hair follicle — Can be used.
Option (2) Saliva — Can be used.
Option (3) Skin tissue — Can be used.
Option (4) Food from stomach — Cannot be used. Food in the stomach is plant or animal material eaten, not the person’s own cells.
NCERT Extract:
DNA Fingerprinting – “… These sequence show high degree of polymorphism and form the basis of DNA fingerprinting. Since DNA from every tissue (such as blood, hair-follicle, skin, bone, saliva, sperm etc.), from an individual show the same degree of polymorphism, they become very useful identification tool in forensic applications.”