MCQ Questions on Chromosomal Basis of Inheritance

MCQ Questions on Chromosomal Basis of Inheritance

1. The term chromosome was coined by ___________.
(a) Sutton
(b) Boveri
(c) Waldeyer
(d) Hoffmeister

Answer

Answer: (c) Waldeyer.


2. Chromosomes found in the salivary gland of Drosophila is___________.
(a) Polytene
(b) Lampbrush
(c) Supernumerary
(d) B-chromosomes

Answer

Answer: (a) Polytene.


3. Lampbrush chromosomes occur in___________.
(a) Oocytes
(b) Cancer cells
(c) Lymph glands
(d) Salivary glands

Answer

Answer: (a) Oocytes.


4. Which of the following is true about the Chromatids?
(a) It is a haploid chromosome
(b) It is a complete chromosome
(c) It is a duplicate chromosome
(d) It is one-half of the replicated chromosome

Answer

Answer: (d) It is one-half of the replicated chromosome.


5. The centromere is that part of the chromosome where___________.
(a) Nicking occurs
(b) Chromatids are attached
(c) Nucleoli are formed
(d) Crossing-over takes place

Answer

Answer: (b) Chromatids are attached.


6. The ends of the chromosome are called ___________.
(a) Satellites
(b) Centromeres
(c) Telomeres
(d) Kinetochore

Answer

Answer: (c) Telomeres.


7. Chromosomes were first observed by___________.
(a) Fleming
(b) Waldeyer
(c) Strasburger
(d) Hoffmeister

Answer

Answer: (d) Hoffmeister.


8. A chromosome with sub-terminal centromere is___________.
(a) Acrocentric
(b) Acentric
(c) Metacentric
(d) Telocentric

Answer

Answer: (a) Acrocentric.


9. The giant chromosome with a number of chromonemeta is___________.
(a) Hetrochromosome
(b) Polytene chromosome
(c) Lampbrush chromosome
(d) Supernumerary chromosome

Answer

Answer: (b) Polytene chromosome.


10. A chromosome with centromere near the middle is called___________.
(a) Metacentric
(b) Acrocentric
(c) Telocentric
(d) Submetacentric

Answer

Answer: (d) Submetacentric.


11. Puffs or balbiani rings in the salivary gland chromosome are the sites of___________.
(a) Protein synthesis
(b) RNA synthesis
(c) DNA replication
(d) DNA duplication

Answer

Answer: (b) RNA synthesis.

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12. Chromosomal theory of inheritance was proposed by___________.
(a) Sutton in 1902
(b) Boveri in 1902
(c) Correns in 1909
(d) Sutton and Boveri in 1902

Answer

Answer: (d) Sutton and Boveri in 1902.


13. More than 200 chromosomes occur in___________.
(a) Dog
(b) Amoeba
(c) Chicken
(d) Gorilla

Answer

Answer: (b) Amoeba.


14. A colour blind daughter may be born if the___________.
(a) Father is normal and the mother is a carrier
(b) Father is normal and the mother is colour blind
(c) Father is colour blind and mother is a carrier
(d) Father is colour blind and mother is normal

Answer

Answer: (c) Father is colour blind and mother is a carrier.


15. A somatic cell in a human male contains___________.
(a) No gene on the sex chromosome
(b) Genes on only on sex chromosomes
(c) Two genes for every sex-linked character
(d) Only one sex-linked gene for each character

Answer

Answer: (d) Only one sex-linked gene for each character.


16. The blue-green algae and bacteria contain ___________.
(a) Three linkage groups
(b) Two linkage groups
(c) One linkage group
(d) None of the above

Answer

Answer: (c) One linkage group.


17. What is the number of linkage groups in the Drosophila?
(a) Two
(b) Four
(c) Eight
(d) None of the above

Answer

Answer: (b) Four.


18. Gene for colour blindness in man is located on ___________.
(a) Both X and Y chromosome
(b) Y-chromosome only
(c) X-chromosome only
(d) Either X-chromosome or Y-chromosome

Answer

Answer: (c) X-chromosome only.


19. Chromosomal constitution in human females can be best written as___________.
(a) 46
(b) 44+2
(c) 44A+XY
(d) 44A+XX

Answer

Answer: (d) 44A+XX.


20. Which of the following disease is sex-linked?
(a) Hepatitis
(b) Leukaemia
(c) Malignancy
(d) Colour blindness

Answer

Answer: (d) Colour blindness.


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