MCQ ON PRINCIPLES OF INHERITANCE AND VARIATION

MCQ ON PRINCIPLES OF INHERITANCE AND VARIATION class 12 for NEET | THE PRINCIPLES OF INHERITANCE AND VARIATION class 12 | MCQ PRINCIPLES OF INHERITANCE AND VARIATION with Answer | Check the below NCERT MCQ question for class 12 Biology chapter 05 based on the with Answers.

MCQ ON PRINCIPLES OF INHERITANCE AND VARIATION

MCQ ON THE PRINCIPLES OF INHERITANCE AND VARIATION class 12 Biology with answers were prepared based on the latest pattern.We have provided class 12 Biology MCQs questions on PRINCIPLES OF INHERITANCE AND VARIATION with Answers to help students understand the concept very well.

MCQ ON PRINCIPLES OF INHERITANCE AND VARIATION is useful for NEET / CSIR / UGC / CBSE / ICSE / AIIMS / EXAM / AFMC EXAM / STATE LEVEL MEDICAL EXAM 2022-23, 2023-24

Introduction:
Genetics deals with the inheritance , as well as the variation of characters from parents to offspring . Inheritance is the process by which characters are passed on from parent to progeny; it is the basis of heredity.Variation is the degree by which progeny differ from their parents.

MCQ ON PRINCIPLES OF INHERITANCE AND VARIATION class 12 for NEET

1. Segregation of gene takes place during

(a) metaphase
(b) anaphase
(c) prophase
(d) embryo formation

Ans (a) anaphase

2. The allele of genes are found on

(a) same chromosomes
(b) homologous chromosomes
(c) nonhomologous chromosomes
(d) any chromosomes

Ans. (b) homologous chromosomes

3. Which is a dominant trait ?

(a) colour blindness
(b) albinism
(c) haemophilia
(d) Rh+ factor

Ans. (d) Rh+ factors

4. ABO blood group system is due to

(a) multifactor inheritance
(b) incomplete dominance
(c) multiple allelism
(d) epistasis

Ans.(c) multiple allelism

5. Marriage between close relatives should be avoided because it induces more

(a) recessive allele to come together
(b) mutations
(c) multiple birth
(d) blood group abnormalities

Ans.(a) recessive alleles to come together

6. The allele which is unable to express its effect in the presence of another is called

(a) codominant
(b) supplementary
(c) complementary
(d) recessive

Ans.(d) recessive

7. The procedure adopted by Mendel which was different from his predecessors is

(a) keeping breeding records
(b) employing many traits at one time
(c) differentiating inherited traits
(d) quantitative analysis of data

Ans.(d) quantitative analysis of data

8. Mendel did not propose

(a) dominance
(b) incomplete dominance
(c) segregation
(d) independent assortment

Ans.(b) incomplete dominance

9. Genotype of F1 individuals can be tested by

(a) Backcross with homozygous recessive parent.
(b) reciprocal crossing
(c) Backcross with heterozygous parent
(d) backcrossing with homozygous dominant parent.

Ans. (a) Backcross with homozygous recessive parent

10. Pleiotropic gene has

(a) multiple genotype
(b) single genotype
(c) single phenotype
(d) multiple phenotype

Ans. (d) multiple phenotype

11.An organism with two identical alleles is

(a) dominant
(b) recessive
(c) heterozygous
(d) homozygous

Ans.(d) homozygous

12. In genetic cross having recessive epistasis , F2 phenotypic ratio would be

(a) 9:6:1
(b) 15:1
(c) 9:3:4
(d) 12:3;1

Ans . (c) 9:3:4

13.Mendel’s last law is

(a) segregation
(b) dominance
(c) independent assortment
(d) polygenic inheritance

Ans.(c) independent assortment

15. The contrasting characters pairs of factors in Mendelian crosses are called

(a) multiple alleles
(b) alleles
(c) alloloci
(d) paramorphs

Ans. (b) alleles

16. In mirabilis / antirrhinum , hybrid between red and white flowered plant is pink flowered .This is

(a) heterosis
(b) segregation
(c) incomplete dominance
(d) dominance

Ans.(c) incomplete dominance

17. Inheritance of skin colour in human beings is an example of

(a) Mendelian inheritance
(b) monogenic inheritance
(c) complementary genes
(d) polygenic quantitative inheritance

Ans.(d) polygenic quantitative inheritance

18. Mendel formulated the law of purity of gametes on the basis of

(a) test cross
(b) back cross
(c) monohybrid cross
(d) dihybrid cross

And.(c) monohybrid cross

19. A cross between hybrid and it’s parent is

(a) back cross
(b) reciprocal cross
(c) monohybrid cross
(d) dihybrid cross

Ans. (a) back cross

20. A gene pair hides the effect of another.The phenomenon is

(a) epistasis
(b) dominance
(c) mutation
(d) none of the above

Ans.(a) epistasis

21. Mendel’s law of independent assortment can be demonstrated by

(a) test cross
(b) back cross
(c) monohybrid cross
(d) dihybrid cross

Ans. (d) dihybrid cross