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How does developmental biology to genetics and evolution?

We first define each concept, then we will try to understand how they hold hands:

• Developmental Biology: This branch of biology, formerly known as the "Embryology" looks like an egg grows into a chicken, or as an acorn grows into an oak. A remarkable fact about this is that these complex processes are orchestrated by the genes!.
• Genetics: This branch is responsible for understanding the biological heritage. The good news is that since Mendel, progress has been made, to the point of being able to understand how genes act at the molecular level.
• Evolution: As we have seen, evolutionary biology is responsible for understanding the relationships between different animals on the planet, common descent and changes experienced by living beings in time.

Now, the union of these 3 concepts is quite apparent, if the development is genetically regulated and if the animals are descended from a common ancestor means that we share many genes in common, so we share common development patterns!. From another point of view, we have an approach to the evolution of animals by observing their development, which many biologists like Ernst Haeckel, as noted and which speak in the next trial.
For now, let's stay with the image of genes that occupy the animals to become what we are all more or less the same, there is a great conservation due to evolution, something that is very simple graphics and clear in the following video:

What are these genes, how the mechanisms of development work? What is the origin of all this?. These and other questions will be addressed during this entire blog. Welcome to a new paradigm of biology, the "Evo-Devo (Evolutionary Developmental Biology), a new way of understanding evolution.