In this HACKSHOT 2.0 one-shot, I cover Principles of Inheritance and Variation in a fast, NEET-focused 35-minute revision. My goal here is simple: NCERT-based clarity + exam temperament. I take you through the core genetics framework you must know—Mendel’s laws, mono- and dihybrid crosses, test cross, back cross, and the exact kind of ratios and logic that NEET loves to twist in options. Along the way, I keep the approach formula-driven but concept-first, so you don’t just memorize 3:1 or 9:3:3:1—you understand when and why they change. I also focus on the “variation” part: reasons behind deviations, linkage basics, and how to think when the question is not straightforward. This is the kind of chapter where students lose marks due to small interpretation mistakes—dominance vs incomplete dominance, genotype vs phenotype, and reading the pedigree/cross correctly. Watch this as a last-day revision, then immediately solve PYQs and a short set of mixed questions—because genetics is all about applying the same few rules under pressure.