Class 10 Science Chapter 8: Heredity and Evolution — MCQ Important Questions
Practice Heredity and Evolution MCQ important questions and mock-test sets for CBSE revision.
Topic-wise important and practice questions
Review question distribution across chapter topics for MCQs.
| Topic | MCQ |
|---|---|
| Earlobe Variation Activity | 5 |
| Dihybrid Cross and Independent Inheritance | 5 |
| Mendel's Pea Plant Experiments | 2 |
| Monohybrid Cross: F1 Generation | 5 |
| Sexual Reproduction and Greater Variation | 4 |
| Accumulation of Variation During Reproduction | 3 |
| Heredity and Inherited Traits | 3 |
| New Trait Combinations in F2 | 3 |
| Dominant and Recessive Traits | 4 |
| Probability of XX and XY Offspring | 4 |
| Restoration of Chromosome Number at Fertilisation | 4 |
| Single Gene Set in Germ Cells | 3 |
| Gene Expression and Plant Height | 5 |
| Human Sex Chromosomes | 4 |
| Interpreting Dominance from Family Data | 3 |
| Maternal and Paternal Contribution to Sex Determination | 4 |
| Monohybrid Cross: F2 Ratios | 4 |
| Population Frequency and Relative Age of Asexual Traits | 5 |
| Sex Determination Strategies in Different Species | 5 |
| Variation in Asexual Reproduction | 4 |
| Chromosomes as Separate Gene-Carrying Units | 5 |
| Genes as Information for Proteins | 4 |
| Designing Inheritance Investigations | 4 |
| Variation and Survival | 4 |
| Equal Genetic Contribution of Parents | 2 |
| Genotype and Phenotype Relationships | 2 |
MCQ Preparation & Exam Strategy
Multiple Choice Questions (MCQs) for Class 10 Science Heredity and Evolution test conceptual clarity, quick elimination of distractors, and rapid application of fundamental definitions.
- Read each question stem carefully before glancing at options to avoid falling for tempting distractors.
- Use the elimination strategy: immediately rule out options that violate core scientific or mathematical rules.
- Watch out for qualifiers like "always", "never", "except", and "not true".
- Review the explanation after each question to reinforce foundational concepts for CBSE examinations.
Sample Questions
Q1. Which of the following statements best describes the primary concept in Heredity and Evolution?
- It follows the standard conservation laws outlined in the NCERT syllabus.
- It applies only under non-standard laboratory conditions.
- It contradicts foundational principles established in earlier chapters.
- It depends entirely on external pressure without physical basis.
Correct Answer: It follows the standard conservation laws outlined in the NCERT syllabus.
Explanation: Under CBSE and NCERT guidelines, fundamental principles in Heredity and Evolution strictly adhere to standard conservation and governing laws.
Q2. In the study of Heredity and Evolution, identifying key variables is critical because:
- Variables help determine the systematic outcome and relationship between quantities.
- Formulas cannot be written without arbitrary assumptions.
- Examiners only award marks for memorized tables.
- Units cancel out automatically in every scenario.
Correct Answer: Variables help determine the systematic outcome and relationship between quantities.
Explanation: Establishing independent and dependent variables is the standard scientific methodology for analyzing concepts in this chapter.
Q3. What is the standard approach to solving numerical problems related to Heredity and Evolution?
- Write given values with units, state the relevant formula, and calculate step-by-step.
- Estimate the final figure directly without intermediate calculations.
- Ignore unit conversions between standard and derived units.
- Rely solely on previous year question choices.
Correct Answer: Write given values with units, state the relevant formula, and calculate step-by-step.
Explanation: Step-by-step calculation with units ensures full credit according to CBSE marking schemes.