NEET 2023 · Class 12

Principles of Inheritance and Variation

Frequency of recombination between gene pairs on same chromosome as a measure of the distance between genes to map their position on chromosome, was used for the first time by

  1. (A)Sutton and Boveri
  2. (B)Alfred Sturtevant
  3. (C)Henking
  4. (D)Thomas Hunt Morgan

The NCERT line that answers it

Verbatim line

His student Alfred Sturtevant used the frequency of recombination between gene pairs on the same chromosome as a measure of the distance between genes and 'mapped' their position on the chromosome.

Chapter
Principles of Inheritance and Variation
Section
4.3.3 Linkage and Recombination
Page
16
Words matched
31 of 31

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

How this line gives the answer

0, emb=1.0, combined=1.0). Verified: high — The span explicitly states that Alfred Sturtevant used recombination frequency to measure gene distance and map chromosome positions, which directly matches the MCQ's specific claim.

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 2023 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.