NEET 2015 · Class 12

Principles of Inheritance and Variation

Alleles are

  1. (A)different molecular forms of a gene
  2. (B)heterozygotes
  3. (C)different phenotype
  4. (D)true breeding homozygotes

The NCERT line that answers it

Verbatim line

Genes which code for a pair of contrasting traits are known as **alleles**, i.e., they are slightly different forms of the same gene.

Chapter
Principles of Inheritance and Variation
Section
4.2 INHERITANCE OF ONE GENE
Page
5
Words matched
23 of 23

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

How this line gives the answer

5, emb=1.0, combined=0.8). Verified: high — The span explicitly states 'they are slightly different forms of the same gene', which directly matches option A's definition of alleles as 'different molecular forms of a gene'.

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 2015 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.