Grade 12 Life Sciences: Paper 2 | Genetics — Matric Exam Essentials

🧠 Exam-ready in minutes! Master Grade 12 Genetics for Paper 2: DNA → genes → alleles, Mendelian inheritance, sex-linkage, pedigrees, and the calculations that examiners love. ▶️ Grade 12 Life Sciences Playlist:    • Matric Life Science - Exam Revision (Grade...   What we will cover 🧬 DNA, gene, chromosome, allele, genotype vs phenotype, homozygous vs heterozygous 🔁 Meiosis, variation, independent assortment and crossing over 📊 Monohybrid crosses: dominant/recessive, complete vs incomplete dominance, codominance 🧯 Test cross and probability: product rule, fraction → percentage conversions 🧩 Dihybrid crosses: 9:3:3:1 ratio, linked genes vs unlinked genes 🧒 Sex-linked traits: X-linked recessive patterns (haemophilia, colour blindness), carrier mothers, affected sons 👪 Pedigrees: symbols, autosomal vs sex-linked, dominant vs recessive, identifying genotypes 🧪 Mutations and variation: gene vs chromosomal, effect on proteins; quick mutation questions 🧰 Biotechnology basics: genetic engineering, GMO examples, ethics overview 📈 Data skills: reading genetic data tables, Punnett grids, ratio deviations and chi-square idea (concept only) Resources & tips ✅ Always define parents’ genotypes, then show meiosis (gametes), fertilisation and Punnett grid ✅ State genotype and phenotype ratios clearly with simplest fractions and percentages ✅ For sex-linkage, put the allele on the X (e.g. Xᴴ, Xʰ); remember males are XY ✅ For dihybrids, assume independent assortment unless told the genes are linked ✅ Quote evidence from pedigrees (skips generations → recessive; more males → likely X-linked) If this helped, hit 👍 and subscribe — it keeps these lessons free for everyone! Tags: Grade 12 Genetics, Life Sciences Paper 2, Mendelian inheritance, Monohybrid cross, Dihybrid cross, Incomplete dominance, Codominance, Test cross, Sex-linked traits, Pedigrees, Probability genetics, Meiosis variation, Linked genes, Mutations, Biotechnology basics, CAPS Life Sciences, Matric revision, Exam prep Life Sciences, SmartPrep Hashtags: #LifeSciences #Grade12 #Genetics #ExamPrep #CAPS #SmartPrep #Monohybrid #Dihybrid #SexLinked #Pedigrees #Matric2025 #Matric2027