Genetics after Mendel's law: Principle of Inheritance and Variation | Class 12 | By Ranveer Sir

Dive into the fascinating world of *Genetics* in this comprehensive Class 12 Biology lecture on *Principle of Inheritance and Variation*. In this video, we explore the advancements in genetics after Mendel's foundational laws of inheritance, providing a deep understanding of how traits are passed across generations and how variations occur.

**What you’ll learn:**

- **Incomplete Dominance & Codominance:** Understand how not all traits follow Mendel’s simple dominant-recessive patterns, and how different alleles interact to express new phenotypes.

- **Multiple Alleles:** Explore the concept of multiple alleles using examples like ABO blood groups, and how this complicates the Mendelian ratios.

- **Linkage & Recombination:** Learn how genes located on the same chromosome are linked and how recombination during meiosis affects genetic variation.

- **Pleiotropy & Polygenic Inheritance:** Discover how a single gene can affect multiple traits (pleiotropy) and how multiple genes influence a single trait (polygenic inheritance), with examples such as skin color.

- **Human Genetics & Pedigree Analysis:** Master the methods used to trace inheritance patterns of genetic traits and disorders in humans using pedigree charts.

- **Chromosomal Theory of Inheritance:** Dive into the chromosomal basis of inheritance and how genes located on chromosomes behave during meiosis.

- **Sex Determination:** Explore how different organisms, including humans, determine sex genetically, with examples like the XX-XY and ZZ-ZW systems.

- **Genetic Disorders:** Understand the inheritance patterns and characteristics of genetic disorders such as Sickle Cell Anemia, Hemophilia, Cystic Fibrosis, and Down Syndrome.

**Why watch this video?**
This video is designed to help Class 12 students strengthen their understanding of genetics beyond Mendel’s basic laws. We provide clear explanations with examples to simplify complex concepts, making it easier for students to grasp advanced genetics topics. This is especially beneficial for students preparing for their CBSE board exams, NEET, and other competitive exams.

---

**Additional Details:**
- **Language:** English
- **Difficulty Level:** Class 12 / Intermediate
- **Recommended for:** CBSE Class 12 Biology, NEET aspirants, and anyone interested in learning advanced genetics concepts.

---

Be sure to stay tuned till the end for exam tips and key takeaways to help you excel in your studies. If you found this video helpful, don’t forget to subscribe for more insightful biology lessons!