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.
  • a. Allele

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

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

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
  • c. A cross-pollinating plant

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.

d. cannot say.

5. A gene mutation is

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

d. None

6. Free and attached earlobes show:

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

d. Complex inheritance.

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

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

b. factor

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
  • a. Two (R, and r)

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.
  • b. Four (RT, Rt, rT, and rt)

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

  • a. 1
  • b. 2
  • c. 3
  • d. 4
  • 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.
  • b. dominant, recessive,

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.
  • c. Dominance

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
  • b. 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
  • d. 9:3:3:1

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

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

16. A phenotype is a:

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

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 the same in the f2 generation.

d. None.

a. Phenotypic ratio

18. (3:1)2 is...

a. 3:1

b.9:1

c. 9:3:3:1

d. none

c. 9:3:3:1

19. The Law of dominance shows that...

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

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.
  • c. Crossing an unknown variety with another recessive variety.

22. Why Mendel chooses pea to study genetics.

  • a. Pea has 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.
  • 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.
  • d. All.

24. Which blood group shows co-dominance?

  • a. A
  • b. B
  • c. AB
  • d. O
  • c. AB

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.

d. b & c.

 

See also:

Life Processes MCQ Chapter 6.

How do Organisms Reproduce MCQ.

Control and Coordination MCQ.

Chemical Reactions and Equations MCQ.

 

Answers: 

1a6d11b16a21c
2c7b12c17a22d
3c8a13b18c23d
4d9b14d19d24c
5d10d15b20b25d

Heredity and Evolution MCQ NCERT Class 10 Science Chapter 9

Ref: Chapter 9 NCERT.

Leave a Comment