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Day 1: The Journey Begins

Candled Eggs

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Unfertilized Egg When the unfertilized egg is candled, a shadow of the yolk is seen at the top of the egg (side view-dark area). If the egg is turned toward the large end, (angle view) the outline of the air space is visible. If the egg is moved on the candler light, the structures within will float around.

Fertilized Egg The 24 hour embryo shows the yolk as the darkest area at the top of the egg. The albumen, or white of the egg, fills the rest of the shell and only the shadow of the air space can be seen.

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EGG BIOLOGICAL IMAGING DATABASE EGG MATH EMBRYOLOGY NIH Image HOME Copyright (C) 1998 University of Illinois at Urbana-Champaign