Principles of Inheritance and Variation NEET Notes 2026 PDF
Soumya Tiwari1 Aug, 2025
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Principles of Inheritance and Variation NEET Notes: Principles of Inheritance and Variation is an important part of the NEET syllabus . It focuses on how traits are passed from one generation to the next and the reasons behind variations in organisms. This chapter forms the foundation of genetics and helps students understand key biological concepts.
For NEET aspirants, mastering this chapter is crucial as it is frequently tested in the exam. Understanding inheritance patterns, genetic disorders, and variations will help you answer questions with confidence.
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Principles of Inheritance and Variation NEET Notes Overview
The chapter Principles of Inheritance and Variation explains the basic rules of heredity formulated by Gregor Mendel, the father of genetics. It also covers other concepts such as chromosomal theory, gene interactions, mutations, and linkage. These topics build a strong foundation for understanding complex genetic phenomena.
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Principles of Inheritance and Variation NEET Notes PDF
PhysicsWallah provides detailed PDF notes for this chapter below. The notes cover every topic, including Mendelian laws, genetic disorders, and linkage.
Download the PDF of Principles of Inheritance and Variation NEET Notes
What are the Principles of Inheritance and Variation?
The principles of inheritance and variation explain how traits are passed from parents to offspring and why offspring exhibit differences. Mendel’s laws—the law of segregation, the law of independent assortment, and the law of dominance—are the foundation of inheritance. Variation occurs due to recombination, mutations, and environmental factors, leading to diversity in living organisms.
Weightage of Principles of Inheritance and Variation NEET Notes - Last 5 Years
The chapter has significant weightage in NEET exams . The table below shows the weightage based on past NEET exams from 2021 to 2025:
| Weightage Following Previous Year’s Trends (2021-2025) | ||||||
| Chapter | Easy | Medium | Hard | Total | Average Q/yr | Weightage |
| Principles of Inheritance and Variation | 8 | 10 | 5 | 23 | 4.60 | 8.95% |
| NEET Chapter Wise Weightage 2026 for Botany | |
| Topics | Weightage (%) |
| Principles of Inheritance and Variation | 10% |
Importance of Principles of Inheritance and Variation NEET Notes
This chapter is essential for understanding genetic patterns, variations, and disorders. It builds the foundation for solving genetic problems.
- Helps in understanding inheritance patterns and genetic principles.
- Assists in solving numerical problems related to genetics.
- Provides insights into human genetic disorders.
- Builds a foundation for advanced biological studies.
Tips for Principles of Inheritance and Variation NEET Notes
Effective preparation involves focus on concepts and regular practice.
- Thoroughly revise Mendel’s laws and their applications.
- Practice solving problems on genetic crosses and inheritance patterns.
- Understand chromosomal theory, linkage, and mutations.
- Use diagrams to simplify concepts like recombination and gene interactions.
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| NEET Syllabus | NEET Biology Notes |
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Principles of Inheritance and Variation NEET Notes FAQs
What are the principles of inheritance and variation?
What are the principles of the law of inheritance?
What is the principle of variation in biology?
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