Heredity and Evolution MCQ

Heredity and Evolution MCQ NCERT Class 10 Science Chapter 9

1. Gene pair that controls a character is called:

  • a. Allele
  • b. Trait.
  • c. Genome.
  • d. Gene pool.

2. A trait is a feature or character. Mendel choose contrasting character present in which plant?

  • a. Rice.
  • b. Pulse.
  • c. Pea.
  • d. Maize.

3. Variation in offspring is high in which case?

  • a. A bacterium dividing asexually
  • b. a self-pollinating plant
  • c. A cross-pollinating plant
  • d. A replicating Virus

4. Two gene mutations (A and B) occurred at the same time in a bacterium. After some gap of time, we see that gene A in the population is 60% while that of gene B is 10%. What can we infer from that?

a. Nature favors gene A, b. Nature is against gene B,  c. Gene A causes fast division in the bacterium, d. cannot say.

5. A gene mutation is

a. Non-directional, b. Random c. Both d. None

6. Free and attached earlobes show:

a. Mendelian inheritance b. Multiple allelism c.Co-dominance d. Complex inheritance.

7. Mendel used the term “_ _ _ _ _ _ ” to show the law of dominance in peas, which we call now as genes.

a. seed, b. factor, c. element d. Thing.

8. A plant with genotype Rr will yield _ _  types of gametes.

  • a. Two (R, and r)
  • b. One (R only)
  • c. One (r only)
  • d. None

9. A plant with genotype RrTt will yield _ _  types of gametes.

  • a. Two (RT, and rt)
  • b. Four (RT, Rt, rT, and rt)
  • c. Two (Rr and Tt)
  • d. None.

10. A plant with genotype RrTtYY will yield _ _  types of gametes.

  • a. 1
  • b. 2
  • c. 3
  • d. 4

11. A round seed is a _ _ _ _  trait while the green seed is a  _ _ _ _  trait respectively.

  • a. dominant, dominant,
  • b. dominant, recessive,
  • c. recessive, recessive,
  • d. recessive, dominant.

Heredity and Evolution MCQ NCERT Class 10 Science Chapter 9

12. Presence of only one trait from contrasting traits in f1 progeny is:

  • a. Incomplete dominance
  • b. Co-dominance
  • c. Dominance
  • d. None.

13. Which ratios among these f1 progeny following show law of dominance?

  • a. 1:1
  • b. 3:1
  • c. 1:2:1
  • d. 9:3:3:1

Heredity and Evolution MCQ14. Which ratios among these f2 progeny following show law of independent assortment?

  • a. 1:1
  • b. 3:1
  • c. 1:2:1
  • d. 9:3:3:1

15. A round seed on cross-pollination with pure round seed yield winkled seeds. Then the possible genotypic ratio of round seed is:

  • a. RR
  • b. Rr
  • c. rr
  • d. None.

16. A phenotype is a:

  • a. trait/character
  • b. gene
  • c. chromosome
  • d. none

17. 3:1 ratio in f2 generation in Law of dominance is a ..

a. Phenotypic ratio

b. Genotypic ratio

c. Genotypic and phenotypic ratios are same in the f2 generation.

d. None.

18. (3:1)2 is…

a. 3:1


c. 9:3:3:1

d. none

19. The Law of dominance shows that…

  • a. A character is dominant while another is recessive.
  • b. F1 progeny have only show dominant trait.
  • c. The dominant character expresses itself in a 3:1 phenotypic ratio in f2.
  • d. All.

20. Alleles of a gene get segregated during gamete formation in a flower. This segregation is independent of any other gene pair. This is :

  • a. Law of dominance.
  • b. Law of segregation.
  • c. none
  • d. Both.

21. A test cross is:

  • a. Crossing an unknown variety with another unknown variety.
  • b. Crossing a known variety with another unknown variety.
  • c. Crossing an unknown variety with another recessive variety.
  • d. None.

22. Why Mendel chooses pea to study genetics.

  • a. Pea have multiple contrasting characters.
  • b. Pea yields numerous seeds per generation which help in correct averaging.
  • c.  They have a short life span so assessment takes a short time.
  • d. All.

23. An example of multiple allelism is:

  • a. Human blood group.
  • b. The eye color of drosophila.
  • c. Sickle celled RBC.
  • d. All.

24. Which blood group shows co-dominance?

  • a. A
  • b. B
  • c. AB
  • d. O

25. Which variation among these will pass into future generations?

a. Somatic cell mutation.

b. Germinal cell mutation.

c. Mutation in a vegetative propagating plant.

d. b & c.



See also:

Life Processes MCQ Chapter 6.  

How do Organisms Reproduce MCQ.

Control and Coordination MCQ.

Chemical Reactions and Equations MCQ.




Heredity and Evolution MCQ NCERT Class 10 Science Chapter 9

Ref: Chapter 9 NCERT.

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