MCQ ON LINKAGE class 12 for NEET

MCQ ON LINKAGE class 12 for NEET | LINKAGE class 12 | MCQ LINKAGE with Answer | Check the below NCERT MCQ question for class 12 Biology based on the with Answers.

MCQ on LINKAGE class 12 Biology with answers were prepared based on the latest pattern.We have provided class 12 Biology MCQs questions on LINKAGE with Answers to help students understand the concept very well.

MCQ ON LINKAGE is useful for NEET / CSIR / UGC / CBSE / ICSE / AIIMS / EXAM / AFMC EXAM / STATE LEVEL MEDICAL EXAM 2022-23, 2023-24

Introduction:
Morgan attributed this due to physical association or Linkage of the two genes and coined the term linkage to describe physical association of genes on a chromosome.Morgan and his team found that even when genes were grouped on the same chromosomes , some genes were very tightly linked show very low recombination.

MCQ ON LINKAGE class 12 for NEET

1. Linkage was discovered by

(a) Hugo de Vries
(b) Bateson
(c) Lamarck
(d) Morgan

Ans (d) Morgan

2. The gene which remain together on the same chromosomes are called

(a) linked genes
(b) unlinked genes
(c) complete genes
(d) incomplete genes

Ans. (a) linked genes

3. The genes which are found on different chromosome are known as

(a) linked genes
(b) unlinked genes
(c) complete genes
(d) all the above

Ans. (b) unlinked genes

4. The unlinked genes show dihybrid ratio of

(a) 9:3:3:1
(b) 1:1:1:1
(c) 3:1
(d) all the above

Ans.(a) 9:3:3:1

5. Unlinked genes test cross ratio

(a) 9:3:3:1
(b) 1:1:1:1
(c) 1:1
(d) 3:1

Ans.(b) 1:1:1:1

6. Linkage was discovered by

(a) Sutton
(b) Muller
(c) Bateson and Punnet
(d) Mendel

Ans.(c) Bateson and Punnet

7. Linkage in plants was first shown in

(a) zea mays
(b) lathyrus odoratus
(c) pisum sativum
(d) caffeine

Ans.(b) lathyrus odoratus

8. Maize with 10 pairs of chromosome has linkage groups

(a) 40
(b) 10
(c) 20
(d) 5

Ans.(b) 10

9. Association of parental combination of characters in offspring in excess of dihybrid cross is due to

(a) linkage
(b) codominant
(c) polygene
(d) all the above

Ans. (a) linkage

10. Strength of linkage is related inversely to distance between

(a) genes
(b) chromatids
(c) chromosome
(d) none of the above

Ans. (a) genes

11. Linkage decrease frequency of

(a) recessive allele
(b) dominant allele
(c) hybridisation
(d) all the above

Ans.(c) hybridisation

12. Distance between two linked genes is measured in map units that depict

(a) ratio of crossing over between them
(b) Cross- over value
(c) Number of genes between them
(d) both b and c

Ans . (b) cross over value

13. Linkage in Drosophila was first discovered by

(a) Bridges
(b) Mendel
(c) Bateson and Punnet
(d) Morgan

Ans.(d) Morgan

15. Linkage groups in human beings are

(a) 46
(b) 23
(c) 22
(d) all the above

Ans. (b) 23

16. Linkage group is in E.coli

(a) single
(b) two
(c) three
(d) four

Ans.(a) single

17. Linkage group in pisum sativum is

(a) 14
(b) 7
(c) 6
(d)8

Ans.(b) 7

18. Linkage group in Drosophila is

(a) 4
(b) 7
(c) 23
(d) all the above

Ans.(a) 4

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19. The gene present on different part of Y chromosome are passed directly from father to son

(a) homozygous condition
(b) holandric Inheritance
(c) next generation
(d) same generation

Ans. (b) holandric Inheritance

20. Sex linked inheritance direct from mother to daughter is

(a) hologynic
(b) holoandric
(c) diagynic
(d) X- ray induced mutations

Ans.(a) hologynic

21. Men are

(a) homogametic
(b) heterogametic
(c) recessive
(d) incomplete

Ans. (b) heterogametic

22. Physical association of genes on a chromosome is called

(a) repulsion
(b) linkage
(c) duplication
(d) mutators gene

Ans.(b) linkage