PPT-Sexual selection can drive speciation

and extinction Major questions Why do males compete for access to females Why are females so choosy direct amp indirect benefits sexy sons good genes Except for sexrole reversed species. Evolutionary Mechanisms. Genetic Drift . Migration. Mutations. Natural Selection. Non-adaptive. Adaptive. Natural. . . Selection. (1) Sexual Selection. (2) Constraints on Natural Selection. Pleiotropy. Speciation—Drift. Drift is important in evolution. Just because an allele is common doesn’t mean selection favored it. Speciation via drift?. Probably not.. Flies in . allopatry. , same environment never . Patterns of Evolution. Credits: 4. External. ! Before we begin…. From the . examination specifications…. Giraffe Evolution?. Revision. 12 bio stuff…. Stuff u should know from Year 12. Natural Selection. 8.7. Starter. What is speciation?. The evolution of new species from existing species.. Learning Objectives. Define speciation. Describe geographical isolation. Explain how geographical isolation can lead to the formation of new species. EVOLUTION #1 (Group 3). Strawberry Frogs Forever. Participants: Lin Xiang. Ingo . Schlupp. Tiffany Roberts. Anne . Grippo. Jerry Farris. Facilitators: Brooke . Species & Speciation. Speciation. Gradual process in which one population separates from another.. AND builds up enough genetic differences to become a new species.. CONTENT SUMMRY:. Species & Speciation.. I. Species Definitions. Species represent the boundary for the spread of alleles . and define the unit in which the modes of evolution operate. Biological Species Concept. Individuals belong to the same species if they can interbreed with each other. Evolutionary Mechanisms. Genetic Drift . Migration. Mutations. Natural Selection. Non-adaptive. Adaptive. Natural. . . Selection. (1) Sexual Selection. (2) Constraints on Natural Selection. Pleiotropy. Concept 22.2: Speciation can take place with or without geographic separation. Speciation can occur in two ways. Allopatric speciation. Sympatric speciation. Allopatric (. “. Other Country. ”. ) Speciation. Matt Keeling. MA 999: Topics in Mathematical Modelling. Tuesday 11-12. Thursday 2-4. Evolution. Lecture 1 Tuesday 6. th. 11-12. . Introduction. . Evidence for evolution. Fitness. Competition.. Lecture 2 Thursday 8. Species. Part B. How do species occur?. Concept . 24.2: Speciation can take place with or without geographic separation. Speciation can occur in two ways:. Allopatric. speciation. Sympatric . speciation. I. Species Definitions. Species represent the boundary for the spread of alleles . and define the unit in which the modes of evolution operate. Biological Species Concept. Individuals belong to the same species if they can interbreed with each other. In this case, there are different selective pressures on each SEX.. Sexual Selection . - Recognized as a deviation from predictions offered by a strict selection model.. 1. The Basics. Sexual Selection . In evolutionary terms a . species . is a group of populations whose members have the potential to interbreed in nature and produce viable, fertile offspring; they do not breed successfully with other .