Embryogenesis is the process by which a fertilized egg develops into a complex organism, involving cell division, differentiation, and morphogenesis.

Neuroectoderm is a specialized region of the ectoderm that gives rise to the nervous system, while ectoderm, mesoderm, and endoderm are the three primary germ layers.

Differentiation is the process by which cells become specialized in structure and function, forming different tissues and organs.

Sonic hedgehog (Shh) is a signaling molecule that plays a critical role in inducing the formation of the neural tube during embryonic development.

Migration is the process by which cells move from one location to another during embryonic development, contributing to the formation of tissues and organs.

Pax6 is a transcription factor that plays a crucial role in the development of the eye, regulating the expression of genes involved in eye formation.

Proliferation is the process by which a cell divides to produce two identical daughter cells, increasing the number of cells in an organism.

The Wnt signaling pathway is involved in regulating cell proliferation and differentiation during embryonic development, playing a crucial role in tissue patterning and organogenesis.

Determination is the process by which a cell commits to a specific fate and loses the ability to become other cell types, marking the beginning of differentiation.

Nodal is a gene that plays a crucial role in regulating the formation of the body's left-right asymmetry, determining the positioning of internal organs.

Morphogenesis is the process by which a tissue or organ takes on its final shape and structure, involving cell movements, tissue interactions, and signaling pathways.

FGF (Fibroblast growth factor) is a signaling molecule that plays a crucial role in regulating the development of the limb bud, initiating and maintaining limb outgrowth.

Apoptosis is the process by which a cell undergoes programmed cell death, eliminating unwanted or damaged cells during development and maintaining tissue homeostasis.

Nkx2.5 is a transcription factor that plays a crucial role in the development of the heart, regulating the expression of genes involved in heart formation and function.

Metamorphosis is the process by which an organism changes its form or structure after birth, undergoing a dramatic transformation in its appearance and lifestyle.