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Evolutionary theory of the maintenance of sex Red Queen running to stay ahead of parasites Speciation ... Avoidance via speciation Parapatric species ...
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... Looking for new candidate genes for mating behaviour and speciation ... 253-284 sibling species morphologically and genetically very similar parapatric ...
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Allopatric versus Sympatric Speciation. Allopatric Speciation. Sympatric Speciation. Parapatric Speciation. Adaptive Radiation. Patterns of Speciation ...
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Parapatric & sympatric theories strongly depend on. reinforcement. Reinforcement ... Sympatric Speciation: Host Shift. Apple & Hawthorn maggot flies (Rhagoletis ...
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Situations intermediate between allopatric and sympatric speciation are also possible, and they are collectively called parapatric speciation.
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Speciation Modes: Pattern & Process. Allopatric. speciation (Parapatric. Speciation) Sympatric ... These characteristics can arise simultaneously or ...
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Natural selection acts on phenotypic variation, selecting against traits that ... Allopatric, parapatric, sympatric. Common to both plants and animals. Speciation ...
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How does speciation happen? Regardless of species concept, two species form a bimodal distribution of phenotypes or genotypes
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Why are islands so ripe for Allop.& Symp speciation? A model for allopatric speciation within an island system: Isolation + Rare Dispersal (e.g. Founders) ...
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I.Molecular divergence is positively correlated with time (Zuckerkandl & Pauling, ... e.g. Hawaii, Canary Islands. 2.biogeographic reconstruction ...
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new species formed by same processes that give rise to ... Heliconius butterflies Cougars. Superspecies (Artenkreis) Parus spp. Gasterosteus aculeatus ...
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Carrion crow & hooded crow. Speciation in animals ... hybrid zone of the hooded and carrion crows (Corvus corone & C. corax) in Europe ...
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... 2 First proposed by Ernst Mayr and later adopted by Stephen Jay Gould Both liked it because they believed that speciation might be rapid in small populations ...
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cladogenesis (splitting of lineages, speciation) ...
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in nature to produce fertile offspring, and whose ... brought together artificially (in zoos, etc.)? Lions and tigers interbreed in zoos, producing ligers. ...
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... Mechanisms Reproductive Isolating Mechanisms PowerPoint Presentation Allopatric speciation of squirrels in the Grand Canyon Allopatric Speciation ...
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Hybrid zone: area where differentiated populations interbreed (incomplete speciation) ... if no selection against hybrid - zone is STABLE ...
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Forces that drive evolution Inheritance Random Genetic Change Natural Selection Genetic drift Migration Etc. Punctuated Equilibrium Adaptive Radiation Microevolution ...
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Change in population (genetic/morphological) resulting from ... Passenger Pigeon. Barro Colorado Island. Gray Whale. Fossil Extinctions. Mass extinctions ...
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0 Species Concepts
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Know about the Important topics from the Life Science subject of CSIR NET Exam conducted by NTA.
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A species is a group of potentially interbreeding animals (a gene pool) ... Hypothetical-- No definite examples in wild animal populations. Gametic isolation ...
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General Biology Unit Four Objective One
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The Cambrian Explosion and the Pace of Evolution ' ... Incipient species? Adaptive? Biologically Meaningful? How do Species Form? ...
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Drive a population away from genetic equilibrium. Small-scale changes in allele ... BULLOCK'S ORIOLE. BALTIMORE ORIOLE. HYBRID ZONE. Are We All Related? ...
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Collected snails from a two-block area. Analyzed the allele frequencies for five genes ... BULLOCK'S ORIOLE. BALTIMORE ORIOLE. HYBRID ZONE. We're All Related ...
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DNA extracted using Qiagene Kit. Amplification of rRNA ... Substitution rate between populations. based on Kimura two parameter model. of substitution (K2M) ...
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THE NATURAL SELECTION: BEHAVIOR ANALYSIS AMONG THE NATURAL SCIENCES M. Jackson Marr School of Psychology Georgia Tech Atlanta, GA 30332-0170 USA mm27@prism.gatech.edu
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Organic Evolution Chapter 6
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humanchimp speciation 1' inferring the mode of speciation from genomic data: a study of the great ap
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Chapter 39 for reference (all relevant figures are in the lecture s) ... Genital warts (HPV) Herpes virus. HIV/AIDS also Impacts nationally and globally ...
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This may eventually lead to the development of a new species if these ... Ex: antelope squirrels are separated by the grand canyon and have evolved independently ...
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Chapter 15 Mechanisms of Speciation
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Topics: Speciation and Reproductive Isolation Patterns of Evolution Rates of Evolution Origin of Life
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... the processes of natural selection and genetic drift. Natural Selection ... This theory describes a natural process that can produce new adaptations and new ...
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Idea dates from Plato, Aristotle, through Linnaeus. Claims that the universe has a ... e.g., Mallard x Pintail Duck. hybrids and backcrosses are fertile ...
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... Donkey. 64 chromosomes 62. HYBRID STERILITY. Mum Dad. Horse Donkey ... Donkey Horse. 31 chromosomes 32. Hinny. HYBRID STERILITY. Chromosome. re-arrangement in ...
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Title: PowerPoint Presentation Author: JHS Last modified by: user Created Date: 8/28/2006 3:14:30 PM Document presentation format: On-screen Show (4:3)
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Only 400-500 Siberian tigers still exist within their range. SPATIAL ASPECTS OF SPECIATION ... Siberian Tiger (~300 Kg) vs. Bengal Tiger (~200 Kg) ...
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The two major schools of classification are evolutionary systematics and cladistics. ... Cladistics is concerned with ancestral and derived characters. ...
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Title: PowerPoint Presentation Author: Diane Wiernasz Last modified by: Blaine Cole Created Date: 11/17/2003 2:35:26 PM Document presentation format
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Groups of interbreeding natural populations that are reproductively isolated from ... Gradualism. Small morphological changes over time. Punctuated equilibrium ...
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An initial step that isolates populations; ... of mitochondrial DNA sequences of snapping shrimp on either side of the isthmus ...
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Synopsis. Adaptation to environments? Why is sex good? ... Physical and biological environments differ radically in PREDICTABILITY ...
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... producing viable offspring Reproductive Barriers Prezygotic reproductive isolation ... but did not present a mechanism Jean-Baptiste Lamarck Lamarck published ...
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North American and European Sycamore 20 Myr. separation fertile hybrids ... Fire and yellow-bellied toads. Bombina bombina. Bombina variegata. Bombina. variegata ...
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The validity of sympatric speciation has been a topic of some incongruity in the ... There are few examples of sympatric speciation. ...
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Meredith Johnson
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Existence of a limited number of universals. No regard to variation in a species ' ... Limits to variation within a species. Non-Evolutionary Approaches III ...
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Title: Descent with Modification Author: Nancy Wheat Last modified by: Nancy Created Date: 1/29/2006 5:20:29 PM Document presentation format: On-screen Show (4:3)
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Evolution and Biodiversity Miller Chapter 5 Essential Questions Be able to describe how the earth is just right for life What is evolution?
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1. Genetic Variability may come from mutations and immigration. ... Cheetahs. Pure bred dogs. Microevolution. Macroevolution. Speciation. Biological Species Concept ...
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Speciation Reading for Monday March 12, 9:00 9:50 am discussion: ... nobody...claims that there is a continuum between eagles and crows' ...
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Speciation Speciation: splitting of one species into 2 different species. What is a species? Based on ability to reproduce. Biological species concept : a ...
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What has favored/allowed greater diversity of fishes on coral reefs than in lakes? ... Sympatric - sister species evolve within the dispersal range of each other, but ...
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... By definition speciation involves reproductive isolation: ... after they have formed Prezygotic ... Common mechanism of speciation in flowering ...
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