PPT-Speciation Prezygotic isolation

Temporal crickets mature at different times Prezygotic isolation Habitat land vs water garter snakes Prezygotic isolation Behavioral firefly mating Prezygotic isolation Gametic. The Origin of Species. Overview: That “Mystery of Mysteries”. In the Galápagos Islands Darwin discovered plants and animals found nowhere else on Earth. Video: Galápagos Tortoise. Fig. 24-1. Speciation. Speciation. – formation of a new species . 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. 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. Chapter 18. “When you realize how perfect everything is, you will tilt your head back and laugh at the sky”. -. Budda. What is a Species?. Biological species concept. : species are groups of actually or potentially interbreeding natural populations which are . (Speciation) . Introductory Terms. - In order for one . population. to become very different from another, they must be reproductively . isolated. - This means that there will no longer be a free exchange of . Species. == “kind” or “type” in Latin. Typological . (morphological) species. . == a group of organisms that share certain characteristics which are different than other groups—usually differences in anatomy. . 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. you need to know…. I’m a MAMMAL!. The Origin of Species. “That mystery of mysteries…”. Darwin never actually tackled how new species arose…. Both in space and time, . we seem to be brought . What defines a species?. Species: a group of organisms that can . interbreed. and produce . fertile. offspring. “Biological Species Concept” . Human species?. Homo sapiens – “wise man” (large brains!). 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. 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 .