MCQ on Linkage | Genetic Linkage - Principles of Inheritance and Variation

 1. The term linkage was coined by

A) G Mendel

B) W Sutton

C) T Boveri

D) T H Morgan


2. The mechanism that can cause a gene to move from one linkage group to another is

A) Translocation 

B) Inversion

C) Crossing over 

D) Duplication


3. In sweet peas the genes for flower colour and pollen length were studied. The double heterozygote showed a preponderance of the parental combinations. This could be due to

A) Independant assortment 

B) Linkage

C) Crossing over 

D) Incomplete Dominance

4) Lack of independent assortment of two genes A and B in the fruit fly Drosophila is due to

A) repulsion

B) crossing over

C) linkage

D) recombination

5. Which of the experiment is suitable to detect linkage?

A) aaBB x aaBB 

B) AaBb x aabb

C) AABB x aabb 

D) AAbb x AaBB

6. The first attempt to show linkage in plants was carried out in

A) Oenothera lamarckiana 

B) Pisum sativum

C) Lathyrus odoratus 

D) Zea mays


7. Two dominant non-allelic genes are 50 map units apart. The linkage is 

A) cis type

B) trans type

C) complete

D) absent / incomplete


8. A and B genes are linked. What shall be genotype of progeny in a cross between AB/ab and ab/ab?

A) AABB and aabb

B)AaBb and aabb

C) AABB and aabb

D) None of these

Learn more: MCQ on Inheritance and Variation


1. D) T H Morgan

2.A) Translocation 

3. B) Linkage

4. C) linkage

5. B) AaBb x aabb

6. D) Zea mays

7. D) absent / incomplete

8. B)AaBb and aabb

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