CBSE Class 12 Biology
The Ultimate 50 Topic Masterlist
2025-26 Session
Complete Your Study:
➜ Class 12 Physics
➜ Class 12 Chemistry
Unit VI: Reproduction
- Megasporogenesis: 7-celled, 8-nucleate Embryo Sac structure. Diagram
- Double Fertilization: Syngamy & Triple Fusion events.
- Spermatogenesis vs Oogenesis: Schematic representations. Process
- Menstrual Cycle: Role of FSH, LH, Estrogen, and Progesterone. Graph
- Implantation: Acrosome reaction and Blastocyst formation.
- ARTs: IVF, ZIFT, and GIFT differences. Case Study
Unit VII: Genetics & Evolution
- Dihybrid Cross: Law of Independent Assortment and ratios.
- Deviations: Incomplete and Co-dominance (Blood Groups).
- Pedigree Analysis: Solving for X-linked and Autosomal traits. Case Study
- DNA Packaging: Nucleosome Model and Histone roles.
- Translation: Detailed mechanism of protein synthesis. Process
- Lac Operon: Regulation mechanism (Inducer and Repressor). Diagram
- Evolution Evidence: Homologous vs Analogous Organs.
- Hardy-Weinberg: Factors affecting Allele Frequency.
Units IX: Biotechnology
- Cloning Vectors: pBR322 structure and selectable markers. Must Draw
- PCR: Denaturation, Annealing, and Extension. Guaranteed
- RNA Interference (RNAi): Mechanism of gene silencing.
- Humulin: Production of genetically engineered insulin.
- ADA Deficiency: Gene Therapy procedure. Case Study
Unit X: Ecology & Environment
- Population Models: Exponential vs Logistic Growth curves. Graph
- Energy Flow: 10% Law and Food Web connections.
- Ecological Pyramids: Inverted vs Upright (Number and Biomass).
- Conservation: In-situ (Hotspots) vs Ex-situ (Cryopreservation) methods.
Asterisk Classes: Analyst Strategy
- Diagram Precision: Labels for DNA or Embryo Sac should be horizontal and on the right side of the drawing.
- Terminology: Use specific NCERT terms like Aneuploidy, Transcription Unit, and Biomagnification.
- Case Studies: These usually come from Human Health or Biotechnology. Read the question stems carefully before the paragraph.