Explore: All CBSE Class 10 chapters · CBSE Class 10 Science PYQs · CBSE Class 10 hub · Syllabus & pattern · Class 10 2026
Answer first
Heredity and Evolution PYQs (previous year questions) for CBSE Class 10: Heredity and Evolution (Science) had 24 questions across the 40 official CBSE Class 10 papers we tagged (2016–2026), and appeared in 10 of them. Asked in 10 of 10 years. The concepts asked in the most papers: Mendel’s Experiments, Sex Determination, Homologous Organs.
Year-wise question count
Asked in 10 of 10 years.
Most-asked concepts
Sorted by the number of papers a concept appeared in.
| Concept | Questions | Papers | Years |
|---|---|---|---|
| Mendel's Experiments | 8 | 8 | 2026, 2024, 2023, 2020, 2019, 2018, 2017, 2016 |
| Sex Determination | 4 | 4 | 2026, 2024, 2023, 2022 |
| Homologous Organs | 3 | 3 | 2020, 2017, 2016 |
| Evolution and Classification | 2 | 2 | 2017, 2016 |
| Variation | 2 | 2 | 2025, 2022 |
| Acquired and Inherited Traits | 1 | 1 | 2017 |
| Chromosomes | 1 | 1 | 2024 |
| Dihybrid Cross | 1 | 1 | 2025 |
| Evolution | 1 | 1 | 2016 |
| Genes | 1 | 1 | 2023 |
How to practise Heredity and Evolution PYQs
- Start with the concepts at the top of the table. They have come back the most.
- Solve one year’s Heredity and Evolution questions from the official PDF against the clock, then check the answer listed below.
- Log every miss as a concept gap, a calculation slip or a misread. Each needs a different fix.
- Once a concept is clean in two papers, move to the next. Then sit a full paper from the year pages.
Questions by year
Each line gives the question number and paper, type, concept, our one-line summary, with a link to the official PDF.
CBSE Class 102026
CBSE Class 102025
CBSE Class 102024
- Q.8 (Science (31/1/1)) · MCQ · Sex Determination: Correct statements on how a child's sex is determined PDF
- Q.9 (Science (31/1/1)) · MCQ · Chromosomes: Correct statements about chromosomes PDF
- Q.38 (Science (31/1/1)) · Case-based · Mendel's Experiments: Case on Mendel's monohybrid and dihybrid crosses PDF
CBSE Class 102023
- Q.10 (Science (31/1/1)) · MCQ · Genes: Correct statement describing a gene PDF
- Q.18 (Science (31/1/1)) · Assertion-Reason · Sex Determination: Assertion-reason on genes deciding sex of a child PDF
- Q.38 (Science (31/1/1)) · Case-based · Mendel's Experiments: Case on Mendel's dihybrid cross and dominant vs recessive traits PDF
CBSE Class 102022
CBSE Class 102020
CBSE Class 102019
- Q.12 (Science (31/1/1)) · Short answer · Mendel's Experiments: Mendel's plant, F1 and F2 progeny and F2 ratio PDF
CBSE Class 102018
- Q.1 (Science (31/1)) · Very short answer · Mendel's Experiments: F1 result of crossing violet and white flowered pea plants PDF
CBSE Class 102017
- Q.14 (Science (31/1)) · Short answer · Mendel's Experiments: How Mendel explained traits inherited but not expressed PDF
- Q.15 (Science (31/1)) · Short answer · Evolution and Classification: Justify that evolution and classification are interlinked PDF
- Q.21 (Science (31/1)) · Long answer · Acquired and Inherited Traits: Distinguish acquired and inherited traits; why acquired ones not passed PDF
- Q.29 (Science (31/1)) · MCQ · Homologous Organs: Pick pair of vegetables showing homologous structures PDF
CBSE Class 102016
- Q.14 (Science (31/1)) · Short answer · Mendel's Experiments: How Mendel showed traits are inherited independently PDF
- Q.15 (Science (31/1)) · Short answer · Evolution and Classification: Justify that evolution and classification are interlinked PDF
- Q.21 (Science (31/1)) · Long answer · Evolution: Define evolution, how it occurs and fossil evidence PDF
- Q.29 (Science (31/1)) · MCQ · Homologous Organs: Pick pair of vegetables with homologous structures PDF
Other Science chapters
- Chemical Reactions and Equations PYQs
- Acids, Bases and Salts PYQs
- Metals and Non-metals PYQs
- Carbon and its Compounds PYQs
- Periodic Classification of Elements PYQs
- Life Processes PYQs
- Control and Coordination PYQs
- How do Organisms Reproduce PYQs
- Light: Reflection and Refraction PYQs
- The Human Eye and the Colourful World PYQs
- Electricity PYQs
- Magnetic Effects of Electric Current PYQs
- Sources of Energy PYQs
- Our Environment PYQs
- Sustainable Management of Natural Resources PYQs
FAQ
How many Heredity and Evolution questions come in CBSE Class 10?
In the official papers we tagged: 2 in 2026, 2 in 2025, 3 in 2024, 3 in 2023, 2 in 2022, 2 in 2020, 1 in 2019, 1 in 2018, 4 in 2017 and 4 in 2016. That is 24 questions in all, about 7% of Science.
Which Heredity and Evolution topics repeat in CBSE Class 10?
Asked in the most papers: Mendel’s Experiments, Sex Determination, Homologous Organs. The concept table lists every one with its count.
Are these official CBSE Class 10 questions?
Yes. Every question is from an official CBSE Class 10 paper hosted on our year pages. The one-line summaries are ours; open the PDF linked beside each question for the full text.