As Mendel proposed the principles of inheritance, which are today referred to as ‘Mendel’s Laws of Inheritance’. There are different types of law that you will study in the principle of inheritance and variation ncert pdf. For example:   

•    Law of Dominance   
•    Law of Segregation   
•    Law of Independent Assortment, etc.  

All these three laws, along with the punett square, are well explained in the NCERT Solutions for Class 12 Biology Chapter 4 Principles of Inheritance and Variation.