Principles of Inheritance and Variation Class 12 Notes PDF

Principles of Inheritance and Variation Class 12 CBSE Revision Notes

This chapter comes under a different section of Biology called Genetics. In other words, genetics is the branch of biology that deals with the study of genes, genetic variation and hereditary organisms. Similarly, genetics deals with the similarities in inheritance as well as the differences in the character of the gametes. Moreover, humans give birth to similar humans, animals give birth to similar animals. In this, principles of inheritance and variation class 12 notes we will revise the whole chapter.

Plants give birth to similar plants because of the presence of the same genes in their offspring. After that, sometimes the child may look exactly like his father or mother or sometimes the child may show no similarity to its parents. Thus, all this is because of Genetics. Principles of inheritance and variation class 12 notes show the scientific explanation of this natural phenomenon. It will give a better understanding to students about the genes of children. Thus, it serves of great importance.

Sub-topics Covered Under Principles of Inheritance and Variation

Introduction to Genetics– This unit explains genetic materials and their role in the origin of a human being.
Laws of Inheritance– Students will learn about the law of inheritance given by the renowned scientists Mendel who specialized in the topic of genetics.
Linkage and Recombination– It explains the phenomenon of linkage and recombination of the two genes given by scientist T.H. Morgan.
Mutation and Chromosomal Disorder– Over here, it discusses how mutation and chromosomal disorder are different phenomena in genetics.
Sex Determination– You will study what decides the sexual characteristics of an organism or offspring.