Class 10 Science Chapter 8: Heredity and Evolution — 2 Marker Important Questions
Practice Heredity and Evolution 2 Marker important questions and mock-test sets for CBSE revision.
Topic-wise important and practice questions
Review question distribution across chapter topics for 2 Mark questions.
| Topic | 2 Mark |
|---|---|
| Earlobe Variation Activity | 2 |
| Dihybrid Cross and Independent Inheritance | 3 |
| Mendel's Pea Plant Experiments | 3 |
| Monohybrid Cross: F1 Generation | 1 |
| Sexual Reproduction and Greater Variation | 2 |
| Accumulation of Variation During Reproduction | 1 |
| Heredity and Inherited Traits | 3 |
| New Trait Combinations in F2 | 2 |
| Dominant and Recessive Traits | 3 |
| Probability of XX and XY Offspring | 1 |
| Restoration of Chromosome Number at Fertilisation | 4 |
| Single Gene Set in Germ Cells | 2 |
| Gene Expression and Plant Height | 0 |
| Human Sex Chromosomes | 2 |
| Interpreting Dominance from Family Data | 2 |
| Maternal and Paternal Contribution to Sex Determination | 4 |
| Monohybrid Cross: F2 Ratios | 2 |
| Population Frequency and Relative Age of Asexual Traits | 0 |
| Sex Determination Strategies in Different Species | 2 |
| Variation in Asexual Reproduction | 2 |
| Chromosomes as Separate Gene-Carrying Units | 2 |
| Genes as Information for Proteins | 2 |
| Designing Inheritance Investigations | 1 |
| Variation and Survival | 1 |
| Equal Genetic Contribution of Parents | 2 |
| Genotype and Phenotype Relationships | 1 |
2 Marker Preparation & Exam Strategy
2 Mark short answer questions require structured two-point answers, brief reasoning, simple differences, or short two-step calculations.
- Structure answers into two distinct, numbered points for clear evaluation.
- For distinction or comparison questions, provide at least two clear parameters of difference.
- Always show the primary formula and step-by-step substitution for calculations.
Sample Questions
Q1. Differentiate between two fundamental processes or classifications discussed in Heredity and Evolution.
Model Answer: State at least two clear points of contrast addressing definition, mechanism, or relevant conditions.
Q2. Explain why a specific condition is necessary for the mechanism in Heredity and Evolution to take place.
Model Answer: Provide scientific or mathematical reasoning showing the cause-and-effect relationship behind the required condition.
Q3. A student makes an observation related to Heredity and Evolution. State two factors that could influence this result.
Model Answer: Identify the two primary environmental, physical, or experimental factors that directly alter the outcome.