BIOL 3040 Study Guide - Evolutionary Developmental Biology, Ontogeny, Homeobox
Document Summary
13. 1 evo-devo: a brief history: define ontogeny, the development of an individual over its lifetime, compare and contrast the ideas about ontogeny and evolution put forward by the. Greeks, meckel, and von baer: greeks: all life was moving from the simple to the complex; parallelism, meckel: the developmental stages of the individual paralleled the evolutionary history of the species being studied. Formerly seen in adult stage of ancestral species and is now appearing in the juvenile stage of descendant species. 13. 2 regulation, expression, and switches: describe the role of homeotic genes in gene expression and development, homeotic genes are master switch genes that encode proteins that activate or repress gene expression. This is referred to as subfuncitonalization: duplicated genes may diverge, thus allowing fro some new, but related, function to evolve. This process is called neofunctionliztion: describe the case of gene duplication of rnase in colobine monkeys, by gene duplication in colobine monkeys the paralogs rnase1and rnase1b emerge.
