Contents: Preface. 1. Basic concepts in Genetics. 2. Structural basis of heredity: cell and its organelles. 3. Chromosomes: The site for hereditary units. 4. Cell division. 5. Gametogenesis and fertilization in plants. 6. Functional basis of heredity. 7. Gene interactions. 8. Structural chromosomal aberrations. 9. Numerical chromosomal aberrations. 10. Linkage. 11. Crossing over. 12. Cytoplasmic inheritance. 13. Sex determination. 14. Mutations. 15. Chemical basis of hereditary. 16. DNA research and its implications in crop improvement. 17. Permutations and combinations. 18. Monohybrid ratios. 19. Dihybrid Ratio. 20. Testing of goodness of fit. 21. Multiple Alleles. 22. Gene interaction. 23. Linkage estimation. 24. Genetics of sex determination. 25. Polygenic inheritance.