Class 10 Science Chapter 8: Heredity and Evolution — 3 Marker Important Questions
Practice Heredity and Evolution 3 Marker important questions and mock-test sets for CBSE revision.
Topic-wise important and practice questions
Review question distribution across chapter topics for 3 Mark questions.
| Topic | 3 Mark |
|---|---|
| Earlobe Variation Activity | 3 |
| Dihybrid Cross and Independent Inheritance | 2 |
| Mendel's Pea Plant Experiments | 3 |
| Monohybrid Cross: F1 Generation | 3 |
| Sexual Reproduction and Greater Variation | 2 |
| Accumulation of Variation During Reproduction | 2 |
| Heredity and Inherited Traits | 2 |
| New Trait Combinations in F2 | 2 |
| Dominant and Recessive Traits | 2 |
| Probability of XX and XY Offspring | 3 |
| Restoration of Chromosome Number at Fertilisation | 2 |
| Single Gene Set in Germ Cells | 1 |
| Gene Expression and Plant Height | 2 |
| Human Sex Chromosomes | 1 |
| Interpreting Dominance from Family Data | 3 |
| Maternal and Paternal Contribution to Sex Determination | 2 |
| Monohybrid Cross: F2 Ratios | 3 |
| Population Frequency and Relative Age of Asexual Traits | 2 |
| Sex Determination Strategies in Different Species | 1 |
| Variation in Asexual Reproduction | 2 |
| Chromosomes as Separate Gene-Carrying Units | 2 |
| Genes as Information for Proteins | 0 |
| Designing Inheritance Investigations | 2 |
| Variation and Survival | 1 |
| Equal Genetic Contribution of Parents | 1 |
| Genotype and Phenotype Relationships | 1 |
3 Marker Preparation & Exam Strategy
3 Mark questions evaluate conceptual depth, multi-step problem solving, diagram explanations, and cause-effect reasoning.
- Organize responses into three well-defined points or three logical reasoning steps.
- Support answers with neat labeled diagrams, chemical equations, or relevant citations where applicable.
- State intermediate values and units clearly in multi-step derivations or numerical problems.
Sample Questions
Q1. Describe the principle, working, or main process in Heredity and Evolution with the help of a labeled diagram.
Model Answer: Provide the governing principle, concise step-by-step description, and neat schematic representation with key labels.
Q2. Derive or explain the relationship between quantities involved in Heredity and Evolution.
Model Answer: State initial assumptions, apply governing laws, and show logical progression to the final expression.
Q3. Analyze a scenario or numerical problem based on Heredity and Evolution and calculate the required outcome.
Model Answer: List given parameters, apply the governing relationship, and state the final result with appropriate units.