Revision Notes For Class 12 Biology Chapter 5 Principles Of Inheritance And Variation

Evolution has led to billions of species, and every species has some characteristic variation among them. Similarly, in humans, the inheritance of characteristics from parent to offspring is decided by genes. This groundbreaking discovery was first observed in Gregor Mendel’s experimentation with peas.

His findings eventually would form the laws of genetics that we are familiar with today. Learn more about how characteristics and features are passed down between generations by exploring Class 12 Biology Revision Notes Chapter 5 – Principles of Inheritance and Variation right here on BYJU’s. We provide concise content outlined with important points and tips for your exams.

Find CBSE Class 12 Biology Chapter 5 Notes

Further Reading

Chromosomal Abnormalities
Cell Division

Frequently asked Questions on CBSE Class 12 Biology Notes Chapter 5: Principles of Inheritance and Variation


Who was ‘Gregor Mendel’?

Gregor Mendel was an Austrian scientist, teacher, and Augustinian prelate who lived in the 1800s.


What is an offspring?

Offspring is defined as a human child or animal child, or the children of a family for many years.


What are the traits of inheritance?

1. Tongue rolling.2. Earlobe attachment.3. Dimples.4. Curly hair.5. Freckles.6. Handedness.7. Hairline shape.


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