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  • 1(current)
Q. No.
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.Henking 2.Thomas Hunt Morgan 
3.Sutton and Boveri 4.Alfred Sturtevant 
Subtopic:  Understanding Linkage | Linkage Types | Recombination & Gene Mapping |
 74%
Level 2: 60%+
NEET - 2023
Hints

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): Mendel's law of Independent assortment does not hold good for the genes that are located closely on the same chromosome.
Reason (R): Closely located genes assort independently.

In the light of the above statements, choose the correct answer from the options given below:

1. (A) is False, (R) is True.
2. Both (A) and (R) are True and (R) correctly explains (A).
3. Both (A) and (R) are True and (R) does not correctly explain (A).
4. (A) is True, (R) is False.
Subtopic:  Dihybrid Cross Analysis | Linkage Types | Recombination & Gene Mapping |
 68%
Level 2: 60%+
NEET - 2022
Hints

The recombination frequency between the genes a & c is 5%, b & c is 15%, b & d is 9%, a & b is 20%, c & d is 24% and a & d is 29%. What will be the sequence of these genes on a linear chromosome?

1. a, c, b, d 2. a, d, b, c
3. d, b, a, c 4. a, b, c, d
Subtopic:  Recombination & Gene Mapping |
 74%
Level 2: 60%+
NEET - 2022
Hints
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What map unit (Centimorgan) is adopted in the construction of genetic maps?

1. A unit of distance between genes on chromosomes, representing 50% cross-over.
2. A unit of distance between two expressed genes, representing 10% cross-over.
3. A unit of distance between two expressed genes, representing 100% cross-over.
4. A unit of distance between genes on chromosomes. representing 1% cross-over.
Subtopic:  Recombination & Gene Mapping |
 59%
Level 3: 35%-60%
NEET - 2019
Hints
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