PPT-D.2 Species and Speciation

Gene Pool All the alleles present in the reproducing members of a population at a given time The gene pool is constantly changing Mutations add new alleles to the population Immigration also adds new alleles changes the allele frequency. Vaccinium. . macrocarpon. ). Brandon . Schlautman. What is a species?. Domain- . Eukarya. Kingdom- Plantae. Phylum- . Magnoliophyta. Class- . Magnoliopsida. Order- . Ericales. Family- . Ericaceae. Is a member of the . What is a Species?. Speciation. – the origin of new species. The . biological species concept. defines a species as a population or group of populations whose members have the potential to interbreed with one another in nature to produce viable, fertile offspring, but who cannot produce viable, fertile offspring with members of other species. 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. I can…. Distinguish between microevolution and speciation.. Compare the definitions, advantages, and disadvantages of the different species concepts.. Describe five types of prezygotic barriers and three types of postzygotic barriers that prevent populations of closely related species from interbreeding.. Phenetic. species concept. : A species is a set of organisms that look similar to each other and distinct from other sets (Sokal and Crovello 1970)..  . Species definitions. Phenetic. species concept. Phenetic. species concept. : A species is a set of organisms that look similar to each other and distinct from other sets (Sokal and Crovello 1970)..  . Species definitions. Phenetic. species concept. Species. – group of organisms that interbreed and produce fertile offspring. Subspecies. – groups that are on the way to being separate species; have started being genetically different. Individuals in the same species share a common gene pool. Section 1 Vocabulary Pretest. Population Genetics. Microevolution. Gene Pool. Allele Frequency. Phenotype Frequency. Total genetic information in a population. Portion of gene copies of a given allele. Learning Goal: . To explore the factors leading to the evolution of a new species. . Success Criteria:. I know I am succeeding when I can… . define the concept of speciation. identify the modes of speciation. Reduction in . gene . flow, genetic and phenotypic change in populations. The study of speciation requires that species be real. Speciation. Speciation is the antidote to sex. Keeps together adaptive groups of traits. Populations must become isolated. Reproductive isolation is key!. Once isolated, populations will evolve independently (different factors affecting each). Two types of speciation. allopatric. geographic separation. 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 . (Unit 10, species concept. Sympatric speciation . Sympatric speciation, (from the Greek ‘same place’) involves the splitting of an ancestral species into two or more reproductively isolated groups without geographical isolation of those groups.. After reading this module you should be able to. Explain . the processes of allopatric and sympatric speciation.. U. nderstand . the factors that affect the pace of . evolution.. Speciation can be allopatric or sympatric.