1 Embryology Preformation vs. Epigenesis. 2 Gametogenesis & Fertilization Nuclei fusion Syngamy - fusion of sperm nucleus with egg nucleus to form the.

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Presentation transcript:

1 Embryology Preformation vs. Epigenesis

2 Gametogenesis & Fertilization Nuclei fusion Syngamy - fusion of sperm nucleus with egg nucleus to form the diploid nucleus.

3 Cleavage, Blastula & Gastrulation – Zygote divides mitosis- cleavage, blastula – By the end of gastrulation - 3 germ layers  ectoderm  mesoderm  endoderm

4 Gastrulation in reptiles, birds, mammals

5 Ontogeny recapitulates phylogeny Embryological development (ontogeny) involves the same progression of changes that have occurred during evolution (phylogeny

6 Cloning Nuclear Transfer Blastomere Separation Stem Cell Research Cancer Regeneration