Developmental biology studies hereditary relationships between species by analyzing embryonic developments occurring at the molecular level. This book on developmental biology presents researches and studies performed by experts across the globe. Theoretical advancements and technological changes that have occurred in this field as well as in molecular genetics have been included in it. While understanding the long-term perspectives of the topics, the book makes an effort in highlighting their impact as a modern tool for the growth of the discipline. It will act as a guide for students and academicians in the fields of evolutionary biology, deep homology and genetics.