The book id prepared with the objective of keeping in mind the existing syllabus in the subject for undergraduate students of agriculture. The subject matter in this text has been presented in such a way that it can be easily grasped by the beginners. Inclusion of appropriate illustrations and diagrams according to the need of subject has been added to the usefulness of this publications. It furnishes the working steps and procedures in an extremely simplified manner so that students will have no difficulty in understanding and performing the exercise. This text offers clear, comprehensive and unique up-to-date coverage on the microscope and its working; plant materials selected as root tips and buds, fixation and preservation, study of mitotic and meiotic cell division, experiments on monohybrid, dihybrid, trihybrid and test cross, epistaic interactions; probability and Chi-square test, study of linkage & chromosome mapping and the study of models on DNA and RNA. At the end of each exercise questions have been incorporated with the space of worksheet.