Embryo development is the process by which a fertilized egg undergoes a series of cell divisions and differentiation to eventually develop into a multicellular organism. This complex process involves the regulation of gene expression, cell signaling, and cell movement to produce a fully formed organism with distinct tissues and organs. Embryo development is a crucial area of research in developmental biology, as it provides insights into the mechanisms that control cell fate, tissue formation, and overall organismal development. Scientists studying embryo development seek to understand the molecular and cellular interactions that drive this process and how disruptions can lead to developmental abnormalities or diseases.