CBSE Class 10 Science MCQs – Online Practice Test (Basic Level)

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Heredity and Evolution Class 10 MCQs | CBSE Science Quiz
CBSE Class 10 Science MCQs — Chapter 8 Heredity & Evolution
Online Practice Test: Heredity and Evolution Class 10 MCQs
Free CBSE Class 10 Heredity and Evolution Science Quiz
Chapter 8 Heredity and Evolution MCQs with Answers | CBSE

Chapter Overview

The CBSE Class 10 Science Heredity and Evolution MCQs provide a comprehensive practice platform for students preparing for board exams. This chapter covers fundamental concepts such as heredity, Mendel’s laws of inheritance, sex determination, and the principles of evolution. Practicing these MCQs through an online practice test with automatic scoring and per-question feedback helps students strengthen their conceptual clarity and improve accuracy under exam conditions. Aligned strictly with the NCERT syllabus, these questions are crafted to match the CBSE board exam pattern, ensuring effective preparation. Students can track their progress, test their knowledge systematically, and build confidence for success in the final examination.

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Chapter 8: Heredity and Evolution

1. The passing of traits from parents to offspring is called:

2. Mendel is famous for his experiments on which plant?

3. Different forms of a gene occupying the same position (locus) on homologous chromosomes are called:

4. In a heterozygous organism, the allele that is expressed is called:

5. The observable characteristics of an organism (like height, colour) are referred to as its:

6. The genetic make-up (allelic composition) of an organism is termed:

7. Mendel’s Law of Segregation states that:

8. Mendel’s Law of Independent Assortment explains:

9. In a monohybrid cross between two heterozygotes (Aa × Aa), the phenotypic ratio of dominant:recessive is:

10. The diagram used to predict offspring genotypes from parental crosses is called:

11. When both alleles in a heterozygote are fully expressed, the phenomenon is called:

12. A red flower crossed with a white flower giving pink offspring demonstrates:

13. In humans, the sex chromosomes are designated as:

14. Which parent determines the sex of the child in humans?

15. Colour blindness and haemophilia are commonly examples of which type of inheritance?

16. A sudden heritable change in DNA sequence that may introduce new traits is called:

17. Differences in traits among individuals of the same species are called:

18. Which mechanism proposed by Darwin explains how evolution occurs?

19. Remains or traces of organisms preserved in rocks are known as:

20. Limbs of vertebrates that have similar underlying structure but different functions are called:

21. Wings of insects and birds are an example of:

22. Reduced or non-functional organs that were functional in ancestors are called:

23. The process by which new species arise from existing ones is called:

24. The cumulative changes in populations over long periods that result in new life forms is:

25. A single ancestral species giving rise to many species adapted to different environments is called:

26. Which of the following is NOT necessary for natural selection?

27. Random changes in allele frequencies in small populations is called:

28. Movement of genes between populations by migration of individuals is termed:

29. Chromosomes that carry the same genes in the same order but possibly different alleles are called:

30. Exchange of chromosomal segments between homologous chromosomes during meiosis is called:

31. A chart that traces the inheritance of a trait through generations of a family is called a:

32. The hypothesis that species remain stable for long periods, interrupted by brief rapid changes is:

33. Which scientist proposed the theory of natural selection?

34. Which is an example of natural selection in action?

35. Similarities due to common ancestry are best shown by:

36. The total collection of genes and alleles in a population is called the:

37. Traits like human height and skin colour that show continuous variation are controlled by:

38. Which of the following provides new alleles in a population?

39. A recessive genetic disorder is most likely to appear in:

40. Traits transmitted only from father to son are most likely:

41. Traits coded by mitochondrial DNA are inherited from:

42. A photographic display of an individual's chromosomes arranged in pairs is called:

43. Down syndrome is caused by:

44. Breeding of plants and animals by humans to obtain desired traits is called:

45. An allele that is masked by another in a heterozygote is called:

46. Sickle cell anaemia results from a mutation in which type of molecule?

47. Diagrams showing evolutionary relationships among organisms are called:

48. When a large portion of a population is wiped out and survivors' genes dominate, this is called:

49. Mendel’s experiments showed that traits are inherited as discrete units called:

50. Crossing between two different varieties to produce a hybrid with desired traits is:

51. For natural selection to produce evolution, which type of variation is essential?

52. Which of the following supports the theory of evolution?

53. Selection that favours one extreme phenotype over others is called:

54. Selection that favours individuals at both extremes of a trait distribution is:

55. Which selection reduces variation by favouring average individuals?

56. Small-scale changes within a population from generation to generation are called:

57. Reproductive isolation between populations often leads to:

58. Overuse of antibiotics in medicine can lead to:

59. Two patterns often used to describe the tempo of evolution are gradualism and:

60. Evolution primarily occurs at the level of:

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