technology improved to allow scientists to dig deeper into the biology of the embryo, and other groups replicated Zernicka-Goetz’s results. Recently, she found a similar cell bias at the two-cell ...

Many four-legged animals go through embryonic stages that have similar features -- gill arches, a notochord, segmentation, and paddle-like limb buds -- as they develop into different adults.

However, gastrulation, the period beyond this cutoff, represents when the embryo begins to form the eventual body plan, making it an interesting stage to understand early organogenesis. “We’ve just ...

No one would ever confuse a human being with a mouse, a chicken, or an elephant, but at the very start of their different ...