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Fertilization and Embryology



Summary
The content provides an in-depth exploration of key biological processes relevant to the GRE exam, focusing on mitosis, meiosis, oogenesis, spermatogenesis, and the intricacies of fertilization, embryology, and early embryonic development.
  • Mitosis and meiosis are foundational concepts, with a particular emphasis on the stages of meiosis one.
  • The process of fertilization includes understanding the corona radiata and zona pellucida, and the acrosomal and cortical reactions.
  • Embryology covers high-yield topics such as indeterminate and determinate cleavage, the development stages from morula to blastocyst, and the significance of the blastocyst in implantation.
  • The transition from a blastocyst to a gastrula, and the process of gastrulation, are critical for understanding early embryonic development.