Principles of Inheritance And Variation Class 12 Notes | PDF

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The “Principles of Inheritance and Variation” in Class 12 explores the foundational concepts of genetics, focusing on how traits are inherited from one generation to the next and how variations arise. It covers Mendel’s laws, including the Law of Dominance, Law of Segregation, and Law of Independent Assortment, which explain the inheritance patterns observed in monohybrid and dihybrid crosses. The chapter also delves into the concepts of alleles, genotype, phenotype, codominance, and incomplete dominance, along with the chromosomal theory of inheritance and the role of sex-linked inheritance in determining traits. Additionally, it discusses genetic disorders and mutations, highlighting their impact on inheritance and variation in populations.

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