BIOL 150 Chapter Notes - Chapter 22: Apoptosis, Morphogen, Programmed Cell Death
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Anterior - toward an animal"s head and away from its tail. Differentiation - the process by which any unspecialized cell becomes a distinct specialized cell type (e. g. , liver cell, brain cell), usually by changes in gene expression. Dorsal - toward an animal"s back and away from its belly. Evo-devo - popular term for evolutionary developmental biology, a research field focused on how changes in developmentally important genes have led to the evolution of new phenotypes. Genetic equivalence - having all different cell types of a multicellular individual possess the same genome. Homeobox - a dna sequence of about 180 base pairs that codes for a dna binding motif called the homeodomain in the resulting protein. Genes containing this usually play a role in controlling development of organisms from fruit flies to humans. Homeotic mutation - a mutation that causes one body part to be substituted for another.
