Questions
36
across 8 papers
Share of subject
8.9%
of 405 Botany Qs
Weightage rank
#2
of 21 chapters
Difficulty
12 easy · 18 medium · 6 hard
Principles of Inheritance and Variation contributed 36 of the 405 NEET Botany questions between 2020 and 2026 (Re-NEET 2026 included). That is 8.9% of the subject and makes it the #2 chapter out of 21 by weightage — roughly 4.5 questions per paper, peaking at 7 in NEET 2026.
Of the 36 questions tagged for difficulty, 33% were easy, 50% medium and 17% hard — a fairly balanced mix of easy and moderate questions.
Its weight has stayed fairly steady: 4.3 questions per paper across NEET 2025, NEET 2026 and Re-NEET 2026, against 4 in 2020–2022.
The single most-tested topic is Exceptions to Mendelian Principles (Co-Dominance) — 4 questions across 4 papers.
23 topics tagged under Principles of Inheritance and Variation. Numbers show how many questions each topic had in each paper; E / M / H are the easy, medium and hard counts.
| Topic | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | Re | Total | E | M | H |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Exceptions to Mendelian Principles (Co-Dominance) | 1 | – | – | – | 1 | – | 1 | 1 | 4 | 1 | 2 | 1 |
| Genetic Disorders: Mendelian Disorders (Sickle-cell Anaemia) | – | 1 | – | – | – | – | 2 | – | 3 | 1 | 2 | – |
| Genetic Disorders (Pedigree Analysis) | – | – | – | 1 | – | 1 | – | – | 2 | – | 1 | 1 |
| Genetic Disorders: Chromosomal Disorders (Down's Syndrome) | – | – | – | 1 | – | – | – | 1 | 2 | 2 | – | – |
| Genetic Disorders: Chromosomal Disorders (Klinefelter's Syndrome) | – | – | – | 1 | 1 | – | – | – | 2 | – | 2 | – |
| Mendel's Laws of Inheritance (Selection of Pea Plant) | 1 | – | 1 | – | – | – | – | – | 2 | 1 | 1 | – |
| Polygenic Inheritance and Pleiotropy (Polygenic Inheritance) | – | – | – | – | – | 1 | 1 | – | 2 | – | 2 | – |
| Sex Determination (Sex Determination in Honey Bee) | – | – | – | – | – | – | 2 | – | 2 | 1 | 1 | – |
| Sex Determination in Other Organisms (Honey bee, Birds, etc.) | – | – | 1 | – | – | – | 1 | – | 2 | 1 | 1 | – |
| Two Genes Interaction (w.r.t Post-Mendelism) (Linkage and Recombination, Recombination Map, etc.) | – | – | 1 | 1 | – | – | – | – | 2 | 1 | 1 | – |
| Exceptions to Mendelian Principles (Incomplete Dominance) | – | – | – | – | 1 | – | – | – | 1 | – | – | 1 |
| Genetic Disorders: Mendelian Disorders (Autosomal Recessive, Autosomal Dominant Disorders) | – | – | 1 | – | – | – | – | – | 1 | 1 | – | – |
| Genetic Disorders: Mendelian Disorders (Color Blindness) r– | – | – | 1 | – | – | – | – | – | 1 | – | 1 | – |
| Genetic Disorders: Mendelian Disorders (Haemophilia) | 1 | – | – | – | – | – | – | – | 1 | – | 1 | – |
| Inheritance of One Gene (Concept of Factors, Law of Dominance, eetc.) | – | – | – | – | 1 | – | – | – | 1 | – | – | 1 |
| Inheritance of One Gene (Law of Dominance) | – | – | – | – | 1 | – | – | – | 1 | – | – | 1 |
| Inheritance of One Gene (Monohybrid Cross) | – | – | – | – | – | – | – | 1 | 1 | – | 1 | – |
| Inheritance of One Gene (Punnett Square) | – | 1 | – | – | – | – | – | – | 1 | 1 | – | – |
| Inheritance of One Gene (Test Cross) | – | – | – | – | 1 | – | – | – | 1 | – | 1 | – |
| Inheritance of Two Gene (Dihybrid Cross) | – | – | – | – | – | 1 | – | – | 1 | – | 1 | – |
| Inheritance of Two Gene (Dihybrid Cross, Law of Independent Assortment, etc.) | – | – | 1 | – | – | – | – | – | 1 | – | – | 1 |
| Polygenic Inheritance and Pleiotropy (Pleiotropy) | – | – | – | 1 | – | – | – | – | 1 | 1 | – | – |
| Two Genes Interaction (w.r.t Post-Mendelism) (Chromosomal Theory of Inheritance and its Verificat…) | 1 | – | – | – | – | – | – | – | 1 | 1 | – | – |
In the NEET papers from 2020 to 2026 (including Re-NEET 2026), 36 Botany questions came from Principles of Inheritance and Variation — 8.9% of the subject, or about 4.5 per paper.
By past weightage it ranks #2 of 21 Botany chapters, so it is one of the five highest-weightage Botany chapters, with 36 questions over 2020–2026.
The most-tested topics are Exceptions to Mendelian Principles (Co-Dominance) (4), Genetic Disorders: Mendelian Disorders (Sickle-cell Anaemia) (3) and Genetic Disorders (Pedigree Analysis) (2). The topic table above lists every topic with its count in each paper.
Of the 36 difficulty-tagged questions, 33% were easy, 50% medium and 17% hard.
Exceptions to Mendelian Principles (Co-Dominance), Genetic Disorders: Mendelian Disorders (Sickle-cell Anaemia), Genetic Disorders: Chromosomal Disorders (Down's Syndrome) and Polygenic Inheritance and Pleiotropy (Polygenic Inheritance) and more were asked in the 2026 papers.
Edurack has chapter-wise NEET previous-year questions for Principles of Inheritance and Variation. Use the practice button on this page to open the set, attempt questions and check your answers.
Counts come from Edurack's tagged set of NEET papers 2020–2026 (including Re-NEET 2026), mapped to NCERT chapters and topics. Use them as a trend guide — past frequency doesn't guarantee what a future paper will ask.