Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Genome (book) wikipedia , lookup
Dual inheritance theory wikipedia , lookup
Quantitative trait locus wikipedia , lookup
Polymorphism (biology) wikipedia , lookup
Genetic engineering wikipedia , lookup
Genome evolution wikipedia , lookup
Designer baby wikipedia , lookup
Adaptive evolution in the human genome wikipedia , lookup
History of genetic engineering wikipedia , lookup
Transitional fossil wikipedia , lookup
Population genetics wikipedia , lookup
Evolution Review Get out your journals! Turn to Evolution Stations! Charles Darwin • Father of: – Evolution • Evolution states: all life as we know it came from •A common Ancestor Peppered Moth Story - Industrial Revolution Time Period Fossil Record • Comparing fossils from older, more primitive species, to younger, more complex species in rock layers document that evolution has occurred. Homologous structures •Same Structure/physical traits Analogous Structures •Same Functions/Different Organisms Examples: Bird and Bat Wings Vestigial organs • Organs that serve no useful function in organisms. • Humans: Appendix • Whales: Pelvic Bone Having lots of species in an area Biodiversity Differences in Genes Variations These 2 factors lead to increased survival in populations. Geographic Isolation: • physical barriers that lead to the development of new species –Mountains –Oceans Natural Selection • Survival of the fittest” • Those that are better suited to their environment (better phenotypes or physical characteristics) survive and reproduce successfully Mutation 2. Mutations • A mistake in DNA that contributes to the variation (introduction of new genes) of a species and is very important in evolution. Gene Flow • Organism’s moving in and out of an area to search for…….. –Hunt for food –Living space –Other resources GENETIC DRIFT • A change in the population because of a random event, such as a catastrophe • The smaller the population, the less genetic variety it has. traits can be lost from one generation to the next. Based on this Cladogram, which organism is most closely related to the Chimp? -Mouse Based on this Cladogram, all of the organisms have jaws except: -Hagfish The Galapagos Island • Darwin’s visit to these islands, the differences in the animals, and his observations that habitat can affect the adaptations of organisms. Behavioral Isolation Camouflage Allows organism to hide from predators The Genetic Basis of Evolution Gene Pool • are all of the alleles (alternate forms of genes) in all of the individuals that make up a population. Temporal Isolation • These are closely related species, but the American toad mates in the early part of summer, while the Fowler's toad mates later in the season. Adaptation • A advantageous trait that allows an organism to better survive. – Ex. Venom – Ex. Camoflauge Embryology • similarities in the early embryos indicated that they descended from a common ancestor Gradualism • Evolution happening slowly. Punctuated Equilibrium • Evolution in a short period of time usually due to some kind of event.