ANT211H5 Lecture Notes - Lecture 3: Progestin, Sexual Differentiation, Preformationism
Document Summary
Sociobiologists cannot ignore analyses of the learning process. Evolution must be understood as a modification of developmental processes over generations. Must defuse the nature vs nurture controversy: we now know they are not separate entities, they are both influenced from each other and thus effect the individual. Male & female pronuclei grow (12 hours) (50% from the mother and 50% from the father) Implantation in the uterine wall: trophoblast cells o blastocyte. 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. Cells are different, even though they all carry an entire compliment of chromosomes in their nucleus. The potential of cells to change their original function: once they change they cannot go back. Often wanes or disappears as differentiation progresses: there"s a period in the early embryo where all the cells are the same (in a very tight period right after gestation)
