Principles of Development Chapter 8. Early Concepts: Preformation vs Epigenesis The question of how a zygote becomes an animal has been asked for centuries.
Animal Reproduction Chapter 42-43 Sexual vs. Asexual Reproduction Asexual offspring all have same genes no variation Sexual gametes (sperm & egg) fertilization.
Embryology
Development of Chicken Embryo
Biology 340 Comparative Embryology Lecture 5 Dr. Stuart Sumida Introduction to Embryology of Deuterostomes Echinodermata - Sea Urchins.
Japanese Medaka Mitotic Images Embryonic Development.
Gastrulation The goal is to form three GERM LAYERS (starting from a hollow ball of cells) Ectoderm: Outside skin, nerves Mesoderm: Blood, Muscle, some.
Dr. Akinyemi, A. A. Department of Aquaculture and Fisheries Management University of Agriculture, Abeokuta, Nigeria.
Animal Reproduction & Development. Acrosomal Process.
Embryonic Development Involves 3 Components: 1. Cell Division- The mitotic increase in the number of cells. 2. Differentiation- The development of specialized.
Cleavage follows fertilization. Functions of cleavage: Multicellular for differentiation The zygote is partitioned into blastomeres. Each blastomere contains.
Developmental Biology The Spemann Experiment Spemann & Mangold, 1923 Danny Ben-Zvi.
