Sex Determination & Recombination Frequency | Class 12 Biology | Genetics | CBSE & UP Board |

🔴 📚 Class 12 Biology – Genetics | Sex Determination & Recombination Frequency In this lecture, we will study two important concepts from Class 12 Biology Genetics: Sex Determination and Recombination Frequency. These topics are important for understanding inheritance, chromosomes, linkage, crossing over, and genetic variation. 🧬 Topics Covered in This Video: ✔️ Sex Determination ✔️ Chromosomal Theory of Sex Determination ✔️ XX–XY Type of Sex Determination ✔️ ZZ–ZW Type of Sex Determination ✔️ XX–XO Type of Sex Determination ✔️ Sex Determination in Humans ✔️ Role of X and Y Chromosomes ✔️ Autosomes and Sex Chromosomes ✔️ Recombination ✔️ Crossing Over ✔️ Recombination Frequency ✔️ Calculation of Recombination Frequency ✔️ Linkage and Genetic Mapping ✔️ Important Examples & Exam-Based Questions ✔️ NCERT-Based Concepts for Class 12 Biology 🎯 Useful For: • Class 12 Biology CBSE • Class 12 Biology UP Board • NEET Biology Preparation • Board Exam Preparation • Genetics Revision • NCERT Biology Revision • Biology Competitive Exam Preparation 📌 Recombination Frequency Formula: Recombination Frequency (%) = (Number of Recombinant Offspring / Total Number of Offspring) × 100 📝 Understanding recombination frequency is especially useful for studying linkage, crossing over, and gene mapping. The lecture focuses on concepts in an easy and exam-oriented manner. 🔔 Subscribe to the channel for more Class 12 Biology lectures, Genetics classes, NCERT explanations, important questions, PYQs, and board/NEET preparation. #SexDetermination #RecombinationFrequency #Class12Biology #Genetics #BiologyClass12 #CBSEBiology #UPBoardBiology #NEETBiology #NCERTBiology #GeneticsClass12 #Linkage #CrossingOver #Recombination #SexDeterminationClass12 #BiologyLecture #Class12Biology2026 #BiologyPreparation #BoardExam #NEETPreparation #NCERT #GeneticMapping #Inheritance #Variation #BiologyLiveClass