Which one of the following techniques can be used to establish the paternity of a child?
A
Protein analysis
B
Chromosome counting
C
Quantitative analysis of DNA
D
DNA finger-printing
Correct Answer: Option D
Explanation
1. Establishing the paternity of a child involves comparing the child's genetic material with that of the potential father.
2. Deoxyribonucleic acid (DNA) carries the unique genetic blueprint of an individual.
3. DNA finger-printing (also known as DNA profiling) is a technique used to identify individuals based on unique patterns (polymorphisms) within their DNA.
4. A child inherits half of their DNA from the mother and half from the father. By comparing the DNA profile of the child with that of the mother and the alleged father, paternity can be established with very high accuracy. Specific DNA markers in the child must be traceable to either the mother or the alleged father.
5. Protein analysis and chromosome counting are not specific enough for paternity testing. While quantitative analysis of DNA might be part of the process, DNA finger-printing/profiling is the specific technique used for identification and relationship testing.