BIO 325 Study Guide - Comprehensive Final Exam Guide - Reading Company, Embryo, Gene
20 Nov 2018
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Embryo: a developing organism between fertilization and birth. The study of animal development is called embryology, after that phase of an organism that exists between fertilization and birth. Fertilization, cleavage, gastrulation, organogenesis, metamorphosis, regeneration, and senescence. Morphogenesis: creation of ordered form- coordinating cell growth, cell migration and cell death. The sperm and egg are highly specialized cells, and only they can transmit the instructions for making an organism from one generation to the next. Stem cells- that are able to form new structures even in adults. The development of many organisms is influenced by cues from the environment that surrounds the embryo or larva. Sex of turtles depends on the temperature the embryo experiences while in the egg. Birth defects, endocrine disruptors, and cancer (pages 735-743) Only 20-50% of human cleavage-stage embryos successfully implant in the uterus. Of the embryos that do implant successfully, studies show that only about 40% survive to term.
