NEET 2013 · Class 12

Principles of Inheritance and Variation

Genetic variation in a population arises due to

  1. (A)recombination only
  2. (B)mutation as well as recombination
  3. (C)reproductive isolation and selection
  4. (D)mutations only

The NCERT line that answers it

Verbatim line

In addition to recombination, mutation is another phenomenon that leads to variation in DNA.

Chapter
Principles of Inheritance and Variation
Section
4.7 MUTATION
Page
21
Words matched
14 of 14

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

6667, emb=0.9518, combined=0.8378). Verified: high — The span explicitly states that both mutation and recombination lead to variation in DNA, which directly matches the correct answer 'mutation as well as recombination' and distinguishes it from the incorrect options.

We did this for 1,565 questions.

Every one traced to the exact sentence in NCERT that answers it, including 90% of the 2026 paper. Sit a mock on the real NEET 2027 computer interface and every mark you drop comes back with its line attached.

Take the free 5-minute checkMore from this chapter

Question text is reproduced from the published NEET 2013 paper for study and commentary. NCERT text is quoted, not redistributed; textbooks remain at ncert.nic.in. Our mapping method, including its measured error rates, is published at /methodology.