Class 12 Biology PYQ | Principles of Inheritance & Variation one shot | NEET 2026

Class 12 Biology PYQ | Principles of Inheritance & Variation one shot | NEET 2026 📌 High-Priority & Frequently Asked Topics 1. Mendel’s Laws of Inheritance • Law of Dominance, Law of Segregation and Law of Independent Assortment — definitions, examples and Punnett square problems.  2. Monohybrid & Dihybrid Crosses • Cross problems, phenotypic and genotypic ratios and explanation of hybrid results.  3. Codominance & Incomplete Dominance • Difference between them with examples like blood groups/incomplete dominance in flowers.  4. Multiple Alleles & Blood Group Inheritance (ABO System) • Punnett squares with blood group crosses.  5. Sex-Linked Inheritance & Sex Determination • X-linked traits (eg. colour blindness, hemophilia), criss-cross inheritance, mechanisms of sex determination.  6. Chromosomal Basis of Inheritance & Linkage • Chromosomal theory, linkage vs independent assortment.  7. Mutation & Genetic Disorders • Types of mutations and common examples like sickle cell anaemia, chromosomal disorders (Down, Turner, Klinefelter).  8. Pedigree Analysis • Reading and interpreting family trees for inheritance patterns.  9. Variation — Types & Causes • Genetic vs environmental variation, role of recombination, crossing-over.  10. MCQ & Quick Recall Terms • Key definitions such as allele, genotype, phenotype, test cross, hemizygous, homozygous and heterozygous.  📝 Question Types That Typically Appear ✔ 1-Mark Questions: Definitions (e.g., allele, genetics, test cross), short difference-type questions.  ✔ 2-3 Mark Questions: Punnett square problems, explain a law, describe inheritance patterns.  ✔ 5-Mark Questions: Long answers on Mendel’s laws, sex-linked inheritance, detailed examples of crosses and genetic disorders.  📌 Tips Based on Exam Trends • Punnett square problems (especially monohybrid/dihybrid and blood groups) appear very often.  • Comparisons and diagram-based answers (like sex determination charts) help fetch better marks.  • Pedigree analysis questions have been appearing repeatedly in board exams. This Rambaan PYQ Series is specially designed to help you score 70/70 in Biology by focusing on: ✔️ Most repeated NEET questions ✔️ Board exam oriented PYQs ✔️ High-weightage concepts ✔️ Expected questions for 2026 If you are preparing for NEET / Class 12 Boards, this video will give you a complete revision of Genetics with exam-level questions and clear explanations. 📌 Chapter: Principles of Inheritance and Variation 📌 Course: Class 12 Biology | NEET 📌 Coverage: Last 10 Years PYQs 📌 Target: 70/70 Score Strategy Watch till the end for highly expected questions and smart exam tips. #NEET2026 #Class12Biology #InheritanceAndVariation Resources: Join our Telegram for notes 🗒️ [https://t.me/bioedge_meghna] Infographic pdf is in telegram channel. Watch more Biology videos: Related Playlists: 🔗 Microbes in human welfare 👉   • Microbes in Human Welfare | Class 12 Biolo...   🔗 Human Reproduction 👉    • Human Reproduction | Class 12 Biology NCER...   🔗 Reproductive Health 👉   • Reproductive Health Chapter | Class 12 NCE...   🔗 Molecular Basis of Inheritance 👉   • Molecular Basis of Inheritance with simple...   🔗 Principles of inheritance and variation 👉   • Principles of inheritance and variation | ...   🔗 Ecology and Environment 👉   • Ecology and Environment- class 12th Biology   ⸻ Search Queries covered- principles of inheritance and variation principles of inheritance and variation pyqs class 12 biology genetics neet genetics pyq last 10 years pyq biology inheritance and variation neet rambaan pyq series class 12 biology boards neet 2026 biology mendel genetics questions highly expected questions neet most repeated neet questions 70/70 biology strategy biology one shot revision genetics previous year questions cbse class 12 biology neet biology full marks