SSC GD 2019 PYQ — Question 46

The correct answer is option 2 i.e. DNA copying.

 

DNA copying is an Inbuilt variation in reproduction that occurs due to sexual reproduction and errors in DNA copying during cell division. While DNA replication is highly accurate, occasional mutations lead to genetic variation, which contributes to evolution and adaptability in species.

Explanation of Other Options:

1. DNA Dividing – This refers to chromosome separation during mitosis or meiosis but does not directly cause variations.

2. DNA Matching – This process ensures genetic compatibility, especially in forensic science or paternity tests, not variation.

3. DNA Multiplying – This describes DNA amplification in laboratory techniques like PCR but does not naturally cause variations in reproduction.