The branch of study which focuses on the heritable phenotype changes which are not associated with changes in the DNA sequence is called epigenetics. The impact of the physiological and cellular phenotypic traits can be due to normal development or might be caused by external factors. The complex of RNA and DNA protein, present in eukaryotic cells, which is responsible for packaging long DNA molecules into dense and compact structure, is termed as chromatin. Epigenetic changes involve the modification in the microstructure of DNA or the chromatin proteins associated with it. This can cause either silencing or activation. This book brings forth some of the most innovative concepts and elucidates the unexplored aspects of epigenetics and chromatin. It presents researches and studies performed by experts across the globe. The book is appropriate for students seeking detailed information in this area as well as for experts.