CUET UG 2026 Biology | Inheritance + Molecular Basis + Evolution Complete Revision By Aarushi Ma'am

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Timestamp:
I. Principles of Inheritance and Variation
[00:04:02] – Mendelian Foundations: A quick recap of why Mendel chose Pisum sativum and the seven pairs of contrasting traits.
[00:04:53] – The Test Cross: Detailed breakdown of how to identify an unknown genotype (Homozygous vs. Heterozygous) by crossing it with a recessive parent.
[00:09:49] – Genetics Probability Practice: Solving a numerical on pea pod color where Green (G) is dominant over Yellow (g), calculating the 75% phenotypic result in an F_2 generation.
[00:12:29] – Non-Mendelian Inheritance: * Incomplete Dominance: The 1:2:1 phenotypic ratio in Snapdragons (Red, Pink, White).
Co-dominance: Understanding AB blood grouping where both alleles express themselves equally.
[00:45:10] – Chromosomal Theory & Linkage: Explaining Morgan’s work on Drosophila and how physical distance between genes affects recombination frequency.
II. Molecular Basis of Inheritance
[01:15:20] – DNA Structure & Packaging: Review of the Double Helix model, Chargaff’s Rule, and how DNA wraps around Histone octamers to form Nucleosomes.
[01:35:45] – The Central Dogma: * Replication: Leading vs. Lagging strand and the role of Okazaki fragments.
Transcription: The structure of a transcription unit (Promoter, Structural Gene, Terminator).
[02:05:10] – Genetic Code & Translation: Properties of the genetic code (Universal, Non-overlapping, Degenerate) and the mechanism of protein synthesis.
[02:15:30] – Lac Operon: A detailed look at gene regulation in prokaryotes—how the presence of Lactose "switches on" the system.
III. Evolution
[02:25:00] – Origin of Life & Evidence: Review of the Urey-Miller experiment and the difference between Homologous (divergent evolution) and Analogous (convergent evolution) organs.
[02:38:45] – Theories of Evolution: Comparing Darwin’s Natural Selection with Hugo de Vries’ Mutation theory (Saltation).
[02:45:15] – Hardy-Weinberg Principle: Understanding the equilibrium equation p^2 + 2pq + q^2 = 1 and the factors that disrupt it (Gene flow, Genetic drift, Selection).
IV. Results and Strategy
[02:53:23] – Performance Leaderboard: The top 10 students from the live MCQ session are celebrated.
[02:54:13] – Exam Prep Advice: Dr. Aarushi emphasizes that while the marathon covers the "core," students must solve the extra questions in the PDF provided on Telegram for a 100th percentile score.


📢 CUET 2026 Biology Free Live Class | SAFAL 4.0 Series

In this session, we cover the most important and high-weightage chapters of Biology:
👉 Principles of Inheritance & Variation
👉 Molecular Basis of Inheritance
👉 Evolution
These chapters are core genetics topics and frequently asked in CUET exams

🎯 What You’ll Learn:
✅ Complete Genetics + Evolution in one session
✅ NCERT-based explanation (line-by-line)
✅ Important diagrams & concepts (DNA, Mendel, Evolution)
✅ PYQs + expected MCQs
✅ Shortcut tricks for revision
✅ High-scoring strategy for CUET 2026

📊 Why This Class Is Important?
👉 Genetics + Evolution = highest weightage in Biology
👉 Questions are mostly concept + application based
👉 One-shot + MCQ practice helps in fast revision before exam

CUET 2026 Preparation Courses :
👉Pravesh CUET Science 2.0 2026
https://physicswallah.onelink.me/ZAZB...

👉Pravesh CUET Humanities 2.0 2026
https://physicswallah.onelink.me/ZAZB...

👉Pravesh CUET GAT + Language 2.0 2026
https://physicswallah.onelink.me/ZAZB...

👉CUET-Science Pocket Courses Cohort
https://physicswallah.openinapp.link/pcs

👉CUET-Arts Pocket Courses Cohort
https://physicswallah.openinapp.link/pca

👉Pravesh CUET - GAT + Language 2026
https://physicswallah.onelink.me/ZAZB...

📚 For Notes, Free Study Material, Tips, Tricks & Insights 👉 Subscribe to PW CUET WALLAH Telegram - https://t.me/pwcuetwallah

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