Consider the following statements 1 DNA fingerprinting involves identifying similarities in so...........

Science Affairs Biotechnology

Consider the following statements

1. DNA fingerprinting involves identifying similarities in some specific regions in DNA sequence

2. DNA from every tissue from an individual show the same degree of polymorphism

3. Satellite DNA show high degree of polymorphism and form the basis of DNA fingerprinting

Which of the given statements is/are not correct?

1 Only

2 and 3 only

1 and 2 Only

1, 2 and 3

First statement is incorrect. DNA fingerprinting involves identifying differences in some specific regions in DNA sequence called as repetitive DNA because in these sequences a small stretch of DNA is repeated many times.
Second statement is correct. Since DNA from every tissue whether 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
Third statement is correct. Satellite DNA forms that minor peak after centrifugation of DNA. These are repetitive DNA sequences that fo not code for any protein. They show high degree of polymorphism and heritable from parents to children, thus form the basis of DNA fingerprinting.
Satellite DNA forms that minor peak after centrifugation of DNA. These are repetitive DNA sequences that do not code for any protein. They show high degree of polymorphism and heritable from parents to children, this forms the basis of DNA fingerprinting