Chapter 8: Heredity and Evolution — Online MCQ Test
SCIENCE · Grade 10 · CBSE(NCERT)
Practice Chapter 8: Heredity and Evolution with a free chapter-wise online MCQ test.
This chapter covers: Mendel Inheritance Traits Genes Chromosomes Dominant Recessive Sex determination Variation Evolution Natural selection Speciation.
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter 8: Heredity and Evolution — Important Questions & Answers
Heredity refers to the:
- A. transfer of characters from parents to offspring
- B. change in body size due to exercise
- C. formation of fossils in rocks
- D. movement of organisms from one place to another
Answer: A. transfer of characters from parents to offspring
Heredity is the transmission of traits from one generation to the next through genetic material.
Heredity is the transmission of traits from one generation to the next through genetic material.
Genes are located on:
- A. ribosomes
- B. chromosomes
- C. cell wall
- D. vacuoles
Answer: B. chromosomes
Genes are segments of DNA present on chromosomes inside the cell nucleus.
Genes are segments of DNA present on chromosomes inside the cell nucleus.
If a pure tall pea plant is crossed with a pure dwarf pea plant, the F1 generation will be:
- A. all tall
- B. all dwarf
- C. half tall and half dwarf
- D. one-fourth dwarf
Answer: A. all tall
Tallness is dominant, so all F1 plants with genotype Tt will appear tall.
Tallness is dominant, so all F1 plants with genotype Tt will appear tall.
In a dihybrid cross between two heterozygous pea plants for round/yellow seeds, the F2 phenotypic ratio is:
- A. 3 : 1
- B. 1 : 2 : 1
- C. 9 : 3 : 3 : 1
- D. 1 : 1 : 1 : 1
Answer: C. 9 : 3 : 3 : 1
A dihybrid cross shows independent inheritance of two pairs of traits, giving a 9 : 3 : 3 : 1 ratio in F2.
A dihybrid cross shows independent inheritance of two pairs of traits, giving a 9 : 3 : 3 : 1 ratio in F2.
Which statement about evolution is most accurate according to NCERT?
- A. Evolution always produces organisms that are superior to older organisms
- B. Evolution is a ladder in which humans are the final goal
- C. Evolution produces organisms adapted to their environments, not necessarily more advanced
- D. Evolution stops when complex organisms appear
Answer: C. Evolution produces organisms adapted to their environments, not necessarily more advanced
Evolution is not a ladder of progress; it results in organisms becoming better suited to particular environments.
Evolution is not a ladder of progress; it results in organisms becoming better suited to particular environments.