BIOA01H3 Lecture Notes - Lecture 35: Homeobox, Body Plan, Evolutionary Developmental Biology

• School: UTSC
• Department: Biological Sciences
• Course: BIOA01H3
• Professor: Steve Joordens

Document Summary

Things evolve populations change over time. Evolution usually happens gradually populations change over hundreds to thousands of years. Speciation occurs once species splits into two or more species. All species share common ancestry splitting of lineages from one ancestral from. Much of evolutions change was caused by natural selection the sole process producing adaptation, the appearance" of design. Even though these structures look different these bones are homologous the humorous is the same but looks different. Genetic tool-kits control growth and development (allows animals to adapt and change) Changes in development switches cause changes in gene expression. Variation in form stems from variation in development. All cells in all tissues within an organism contain the entire genome. However, only subsets of the genome are expressed in any given cell. Evolutionary development biology (evo-devo: new concept of evolution, looking at evolution through development, genes of development also regulate morphology.