ANT211H5 Lecture Notes - Lecture 3: Enzyme, Pronucleus, Yolk Sac
Document Summary
Implantation in the uterine wall: trophoblast cells (outer layer of cells, form placenta, blastocyte (inner cells, form yolk sac) Differentiation : the emergence of structural organization whereby cell types and structures differ from one another. A multiplicity of cell types all arise from a single cell zygote. Equipotentiality among cells: the potential of cells to change their original function, often wanes or disappears as differentiation progresses, can control it with blastocytes. Development: the emergence of structural organization whereby cell types and structures differ from one another, a multiplicity of cell types all arise from single cell zygote. Is a process of continual alteration of pre-existing structure within a particular environment. An organism"s structure changes over time as an interactive function of the pre-existing structure, and the environment which the structure is in. Interplay between genetics and environment through development: contradicts preformation. Idea that sperm contains all info for preformed individual.
