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

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.	Which of the following is incorrect regarding ZW – ZZ type of sex determination ?
	A.It occurs in birds and some reptiles.
	B.Females are homogametic and males are heterogametic.
	C.1:1 sex ratio is produced in the offsprings.
	D.All of these

Ans: Females are homogametic and males are heterogametic.

Q2.	A couple has six daughters. What is the possibility of their having a girl next time ?
	A.10 %
	B.50 %
	C.90 %
	D.100 %

Ans: 50 %

Q3.	Number of autosomes present in liver cells of a human female is
	A.22 autosomes
	B.22 pairs
	C.23 autosomes
	D.23 pairs

Ans: 22 pairs

Q4.	Haplodiploidy is found in
	A.grasshoppers and cockroaches
	B.birds and reptiles
	C.butterflies and moths
	D.honeybees, ants and waspe.

Ans: honeybees, ants and waspe.

Q5.	Rate of mutation is affected by
	A.temperature
	B.X-rays
	C.gamma rays
	D.all of these.

Ans: all of these.

Q6.	Two or more independent genes present on different chromosomes which determine nearly same phenotype are called
	A.supplementary genes
	B.complementary genes
	C.duplicate genes
	D.none of these.

Ans: duplicate genes

Q7.	Select the incorrect statement regarding pedigree analysis.
	A.Solid symbols show unaffected individuals.
	B.Proband is the person from which case history starts.
	C.It is useful for genetic counsellors.
	D.It is an analysis of traits in several generations of a family.

Ans: Solid symbols show unaffected individuals.

Q8.	To determine the genotype of a tall plant of F₂ generation, Mendel crossed this plant with a dwarf plant. This cross represents a
	A.test cross
	B.back cross
	C.reciprocal cross
	D.dihybrid cross.

Ans: test cross

Q9.	Which of the following is a test cross ?
	A.TT × TT
	B.Tt × Tt
	C.tt × tt
	D.Tt × tt

Ans: Tt × tt

Q10.	Mendal formulated the law of purity of gametes on the basis of
	A.monohybrid cross
	B.dihybrid cross
	C.test cross
	D.back cross.

Ans: monohybrid cross

Q11.	The inheritance of flower colour in Antirrhinum (dog flower) is an example of
	A.incomplete dominance
	B.co-dominance
	C.multiple alleles
	D.linkage.

Ans: incomplete dominance

Q12.	In Antirrhinum (dog flower), phenotypic ratio in F₂ generation for the inheritance of flower colour would be
	A.3 : 1
	B.1 : 2 : 1
	C.1 : 1
	D.2 : 1

Ans: 1 : 2 : 1

Q13.	Phenotypic and genotypic ratio is similar in case of
	A.complete dominance
	B.incomplete dominance
	C.over dominance
	D.epistasis.

Ans: incomplete dominancec

Q14.	What can be the blood group of offspring when both parents have AB blood group ?
	A.AB only
	B.A, B and AB
	C.A, B, AB and O
	D.A and B only

Ans: A, B and AB

Q15.	Inheritance of roan coat in cattle is an example of
	A.incomplete dominance
	B.codominance
	C.multiple allelism
	D.none of these

Ans: codominance

Q16.	ABO blood grouping in human beings cites the example of
	A.incomplete dominance
	B.co-dominance
	C.multiple allelism
	D.both

Ans: and (c)

Q17.	In mice, Y is the dominant allele for yellow fur an y is the recessive allele for grey fur. Since Y is lethal when homozygous, the result of cross Yy × Yy will be
	A.3 yellow : 1 grey
	B.2 yellow : 1 grey
	C.1 yellow : 1 grey
	D.1 yellow : 2 grey

Ans: 2 yellow : 1 grey

Q18.	How many types of gametes can be produced by a diploid organism who is heterozygous for 4 loci ?
	A.4
	B.8
	C.16
	D.32

Ans: 16

Q19.	Which of the following is correct for the condition when plant YyRr is back crossed with the double recessive parent ?
	A.9 : 3 : 3 : 1 ratio of phenotypes only
	B.9 : 3 : 3 : 1 ratio of genotypes only
	C.1 : 1 : 1 : 1 ratio of phenotypes only
	D.1 : 1 : 1 : 1 ratio of phenotypes and genotypes

Ans: 1 : 1 : 1 : 1 ratio of phenotypes and genotypes

Q20.	Law of independent assortment can be explained with the help of
	A.dihybrid
	B.test cross
	C.back cross
	D.monohybrid cross

Ans: dihybrid

MCQ Questions for Class 12 Biology

NCERT Solutions for Class 12 Biology

Class 12 Biologys

NCERT SOLUTIONS FOR CLASS 12

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-B

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

MCQ Questions for Class 12 Biology

NCERT Solutions for Class 12 Biology

Class 12 Biologys

NCERT Solutions for Class 12 Biology

NCERT Solutions for Class 12 Biology

Class 12 Biology

Class 12 Biology

Class 12 Biology

Class 12 Biology

Biology : Class 12

Biology : Class 12

NCERT Biology Class 12

NCERT Biology Class 12

NCERT Bio Class 12

NCERT Bio Class 12

12th NCERT Biology

12th NCERT Biology

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Class 12 Biology Chapters

MCQ QUESTIONS WITH ANSWER

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