ZOO 2090 Lecture Notes - Spermatocyte, Immature Ovum, Spermatid

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23 Mar 2012
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Morphogenesis: growth and organization of biological form, cells from different layers interact to form tissues and organs. Knockout mice: mice in which expression of one gene is repressed, providing models of human disorders. Fertilization: fusion of two haploid gametes (sperm and egg), triggers dna and protein synthesis and metabolic rate. Blastula: hollow sphere of cells (called blastomeres) produced during development of embryo by repeated cleavage of egg. No change in size: cells become smaller as cytoplasm is divided into cells. Blastocoel is a fluid filled cavity within the blastula. Gastrulation: beginning of differentiation, migration of cells. Blastopore: located at the vegetal pole, future anus (mouth is at animal pole). Larve: free living, immature form of an animal which transforms into the adult via metamorphosis. Metamorphosis: occurs in amphibians insects and marine invertebrate groups: transition between larval and adult. Germ cells: give rise to gametes (through the process of gametogenesis) Somatic cells: give rise to other structures of the body.

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