“Principles of Genetics” by Pranab Paul is a well-structured and concept-oriented textbook designed specifically for undergraduate students pursuing Zoology (Major and Minor) in the 3rd Semester under the FYUGP NEP curriculum of Gauhati University and other Indian universities.

This book provides a clear and comprehensive understanding of fundamental genetic concepts, ranging from Mendelian inheritance to modern molecular genetics. Each chapter is carefully crafted with conceptual clarity, illustrative examples, and well-labeled diagrams to simplify complex topics. The text follows a student-friendly approach, supported with problem-solving exercises, short notes, and objective-type questions to reinforce learning.

Special emphasis is placed on the latest developments in classical and molecular genetics, gene mapping, chromosomal theory, mutation, and regulation of gene expression — making it highly relevant to contemporary curricula and scientific progress.

Published by Mahaveer Publications, this book serves as a reliable academic companion for students aiming to build a strong foundation in genetics, while aligning strictly with the National Education Policy (NEP)

UNIT I (Pages 1–88)

1. Principles of Inheritance – 2

2. Incomplete Dominance – 14

3. Codominance – 15

4. Multiple Alleles – 17

5. Lethal Alleles – 18

6. Penetrance – 20

7. Expressivity – 21

8. Epistasis – 23

9. Pleiotropy – 30

10. Sex-limited Characters – 31

11. Sex-influenced Characters – 32

12. Concept of Gene – 35

13. Linkage and Crossing Over – 39

14. Cytological Basis of Crossing Over – 47

15. Recombination Frequency as a Measure of Linkage Intensity – 50

16. Two-factor and Three-factor Cross – 51

17. Linkage Map – 56

18. Interference and Coincidence – 57

19. Gene Mapping by Somatic Cell Hybridisation – 59

UNIT II (Pages 89–142)

1. Mutation – 89

2. Chromosomal Aberrations – 90

3. Euploidy & Aneuploidy – 94

4. Hereditary Abnormalities in Humans due to Aneuploidy – 101

5. Induced Mutation – 104

6. Spontaneous Mutation – 104

7. Backward Mutation – 106

8. Forward Mutation

9. Suppressor Mutation

10. Molecular Basis of Mutation

11. Detection of Mutations

12. Role of Transposons

13. DNA Repair Mechanisms

UNIT III

1. Sex Determination

2. Genetics of Sex Determination

3. Genic Sex Determination (GSD)

4. Environmental Sex Determination (ESD)

5. Mechanism of Dosage Compensation

6. Chloroplast Inheritance

7. Antibiotic Resistance

8. Mitochondrial Mutation in Yeasts

9. Infective Effects – Shell Coiling in Snail

10. Polygenic Inheritance – Kappa Particles in Paramecium

11. Transgressive Variation