A Fate Map of the Chick Embryo
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A 3-D fate map of the chicken (Gallus gallus) embryo with the prospective point of ingression and yolk. The area where the primitive streak will form during gastrulation is shown. The anterior- posterior axis is shown by labeling the anterior and posterio ends (A) and (P). Different colors indicate prospective fates of different regions of the epiblast after gastrulation. The turquoise shaded region represents the prospective ectoderm, the lavender shaded region represents the prospective mesoderm, the dark blue shaded region represents the prospective endoderm, and the white shaded region represents the prospective extraembryonic area.