MCQ Questions for Class 12 Biology Chapter 5 Principles of Inheritance and Variation with Answers

MCQ Questions for Class 12 Biology Chapter 5 Principles of Inheritance and Variation with Answers Set-C 

MCQ Questions for Class12 Biology Chapter 5 Principles of Inheritance and Variation

Principles of Inheritance and Variation Class 12 Biology MCQs Questions with Answers

Check the below NCERT MCQ Questions for Class 12 Biology Chapter 5 Principles of Inheritance and Variation with Answers Pdf free download. MCQ Questions for Class 12 Biology with Answers were prepared based on the latest exam pattern. We have Provided Principles of Inheritance and Variation Class 12 Biology MCQs Questions with Answers to help students understand the concept very well.

Class 12 Biology Chapter 5 Quiz

Class 12 Biology Chapter 5 MCQ Online Test


You can refer to NCERT Solutions for Class 12 Biology Chapter 5 Principles of Inheritance and Variation to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Principles of Inheritance and Variation Class 12 Biology MCQ online test

Q1. Mendel’s work was rediscovered by three scientists in the year
A.1865
B.1900
C.1910
D.1920
Ans: 1900
Q2. Which three scientists independently rediscovered Mendel’s work ?
A.Avery, McLeod, McCarty
B.Sutton, Morgan and Bridges
C.Bateson, Punnet and Bridges
D.de Vries, Correns and Tschemark
Ans: de Vries, Correns and Tschemark
Q3. Chromosomal theory of inheritance was given by
A.Morgan et al
B.Sutton and Boveri
C.Hugo deVries
D.Gregor J. Mendel
Ans: Sutton and Boveri
Q4. Experimental verification of ‘chromosomal theory of inheritance’ was done by
A.Sutton and Boveri
B.Morgan et al
C.Henking
D.Karl Correns.
Ans: Morgan et al
Q5. Genes located very close to one another on same chromosome tend to be transmitted together and are called as
A.allelomorphs
B.identical genes
C.linked genes
D.recessive genes
Ans: linked genes
Q6. What is true about the crossing over between linked genes ?
A.No crossing over at all
B.High percentage of crossing over
C.Hardly any crossing over
D.None of these
Ans: Hardly any crossing over
Q7. Chromosome maps/genetic maps were first prepared by
A.Sutton and Boveri (1902)
B.Bateson and Punnett (1906)
C.Morgan (1910)
D.Sturtevant (1911)
Ans: Sturtevant (1911)
Q8. The distance between the genes is measured by
A.angstrom
B.map unit
C.Dobson unit
D.millimetre
Ans: Dobson unit
Q9. Which of the following is suitable for experiment on linkage ?
A.aaBB x aaBB
B.AABB x aabb
C.AaBb x AaBb
D.AAbb x AaBB
Ans: AABB x aabb
Q10. Mendel’s law of independent assortment does not hold true for the genes that are located closely on
A.same chromosome
B.non-homologous chromosomes
C.X-chromosome
D.autosomes
Ans: same chromosome
Q11. If linkage was known at the time of Mendel then which of the following laws, he would not have been able to explain ?
A.Law of dominance
B.Law of independent assortment
C.Law of segregation
D.Law of purity of gametes
Ans: Law of independent assortment
Q12. Which of the following are reasons for Mendel’s success ?
(i) Usage of pure lines or pure breeding varieties
(ii) Consideration of one character at a time
(iii) Maintenance of statistical records of experiments
(iv) Knowledge of linkage and incomplete dominance
A.(i) and (ii) only
B.(i), (ii) and (iii)
C.(i) and (iv) only
D.(ii), (iii) and (iv)
Ans: (i), (ii) and (iii)
Q13. XO type of sex determination and XY type of sex determination are the examples of
A.male heterogamety
B.female heterogamety
C.male homogamety
D.both (b) and (c)
Ans: male heterogamety
Q14. Grasshopper is an example of XO type of sex determination in which the males have
A.one X chromosome
B.one Y chromosome
C.two X chromosomes
D.no X chromosome
Ans: one X chromosome
Q15. In XO type of sex determination
A.females produce two different types of gametes
B.males produce two different types of gametes
C.females produce gametes with Y chromosome
D.males produce gametes with Y chromosome.
Ans: males produce two different types of gametes
Q16. If both parents are carriers for thalassaemia, which is an autosomal recessive disorder, what are the chances of pregnancy resulting in an affected child ?
A.25 %
B.100 %
C.No chance
D.50 %
Ans: 25 %
Q17. Select the disease which is caused by recessive autosomal genes when present in homozygous conditions.
A.Alkaptonuria
B.Albinism
C.Cystic fibrosis
D.All of these
Ans: All of these
Q18. Which of the following trait is controlled by dominant autosomal genes ?
A.Polydactyly
B.Huntington’s chorea
C.PTC (phenylthiocarbamide) tasting
D.All of these
Ans: All of these
Q19. Failure of segregation of chromatids during cell division results in the gain or loss of chromosomes, this is called as
A.euploidy
B.monoploidy
C.aneuploidy
D.polyploidy
Ans: aneuploidy
Q20. Trisomy is represented by
A.(2n – 1)
B.(2n – 2)
C.(2n + 2)
D.(2n + 1)
Ans: (2n + 1)

MCQ Questions for Class 12 Biology


NCERT Solutions for Class 12 Biology


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    MCQ Questions for Class 12 Biology Chapter 5 Principles of Inheritance and Variation Set-B
    MCQ Questions for Class 12 Biology Chapter 5 Principles of Inheritance and Variation Set-C
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      NCERT SOLUTIONS FOR CLASS 12

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