MeSH definition : A small whitish spot on the surface of the EGG YOLK where cleavage begins. Upon fertilization
the cytoplasm streams from the vegetal pole away from the yolk to the animal pole
where cleavage will occur. This germinal area eventually flattens into a layer of
cells (BLASTODERM) that covers the yolk completely.;
A small whitish spot on the surface of the EGG YOLK where cleavage begins. Upon fertilization
the cytoplasm streams from the vegetal pole away from the yolk to the animal pole
where cleavage will occur. This germinal area eventually flattens into a layer of
cells (BLASTODERM) that covers the yolk completely.
Allowable qualifiers