BIOL303 Lecture Notes - Lecture 1: Germ Layer, Germ Cell, Gastrulation
10 Dec 2016
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Study all processes relating to how a multicellular organism forms from a single cell and how that organism. Produce other single cells that propagates the species (germ line) or production of gametes. The process of progressive and continuous change that generates a complex multicellular organism from a single cell; occurs throughout embryogenesis, maturation to the adult form and continuous into senescence (key: differentiation to germ line, maturation and senescence: definitions: Gametes: specialized reproductive cell through which sexually reproducing parents pass their chromosome to their offspring; sperm or an egg. Zygote: fertilized egg with a diploid number of chromosomal component in its zygote nucleus generated by fusion of haploid male and female pronuclei. Cleavage: a series of rapid cell mitotic divisions following fertilization in many embryos; cleavage divides embryo but not increasing its mass. Blastomere: a cleavage-state cell resulting from mitosis. Morula: vertebrate embryo of 16-64 cells; precedes the blastula or blastocyst stage.
