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

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

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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

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

Class 12 Biology Chapter 5 Quiz

Class 12 Biology Chapter 5 MCQ Online Test

Principles of Inheritance and Variation Class 12 Biology MCQ online test

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NCERT Solutions for Class 12 Biology

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