Section 16 — NEET-Pattern Practice Questions (Principles of Inheritance and Variation)
Chapter 4 is consistently one of the highest-yield NEET chapters — typically 3–5 questions every year, ranging from straightforward (definitions, ratios) to challenging (multi-step pedigree and linkage problems).
This section is a focused 28-question NEET-pattern practice quiz covering the whole chapter — Mendel's laws, monohybrid and dihybrid crosses, deviations and ABO, linkage, sex determination, sex-linked inheritance, mutations and genetic disorders.
Important note: These are NEET-pattern practice questions built on the recurring core concepts of the chapter. Do not treat them as exact authenticated NEET PYQs unless each question is separately matched with an official NEET paper and year.
How to use: Treat this like a timed mock — give yourself about 25 minutes for all 28 questions. Attempt first, then read each explanation carefully. Use the Mini Memory Capsule below to spot the recurring question patterns.
Mini Memory Capsule — NEET's Top 7 Hooks for Chapter 4
Most NEET questions on this chapter fall into these patterns:
1. Ratio identification — 3:1, 9:3:3:1, 1:2:1, 1:1:1:1. 2. Punnett square calculations — compute genotype/phenotype probabilities. 3. ABO blood group inheritance — multiple alleles + codominance. 4. Sex determination — heterogametic sex in different systems (XY, XO, ZW, haplodiploid). 5. Pedigree pattern recognition — autosomal vs X-linked, dominant vs recessive. 6. Linkage + recombination — RF calculations, gene mapping. 7. Genetic disorders — Mendelian vs chromosomal; specific cause + symptoms.