Key events: 1st two nuclear
1 lasts for about 25 min (0-0:25 h) and begins once the egg has been laid,
and ends when the first two cleavage divisions have been completed.
histological sections, the fertilized egg displays homogeneously distributed
yolk granules and egg cytoplasm; only the periphery of the egg, occupied
by a thin rim of periplasm, and a cytoplasmic island, located dorsally
within the anterior one-third of the egg, which contains the female pronucleus,
are yolk free.
Stage 1 (0.1 MB)
1, basic fuchsin staining