BIOM 182Bang, Michel(Christofer)2013 FallWeek 8Lecture 17February 25Speciation- Allopatric- Populations are split into geographically isolated groups. Over time, geneticchanges will occur until they are also reproductively isolated.- Sympatric- Populations are split by genetic or behavioral patterns while living in thesame physical area - Parapatric- Populations spread over a large area, but individuals more likely to mate withtheir closest geographic neighbor. Reduced gene flow and varying selection pressuresPrezygotic-Habitat Isolation-Behavioral Isolation-Temporal Isolation-Mechanical Isolation-Gametic Isolation*Anything that ends with “Isolation” is Prezygotic*Postzygotic- Reduced Hybrid viability- Reduced Hybrid fertility- Hybrid breakdownCoevolution- An adaptation in one species may lead to the evolution of an adaptation in a species itinteract with Evolutionary arms raceThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- Evolution of traits that increase the fitness of a predator or parasite exerts selectionpressure on its prey or host species to counter the consumer’s adaptation- In other words; If the prey is becoming more productive, the predator will adapt to bemore productive (or vice versa)Convergent Evolution- Independently evolved traits subjected to similar selection pressures may becomesuperficially similar * Remember the Cats and Owls- In other words, species that are similar, but are from different places. *Remember theplants from America and
View Full Document
Unlocking...