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15161163019Oparin-Haldane hypothesisEarth had a reducing (electron adding) environment where simple molecules + energy (UV lightening) formed organic compounds0
15161193105Miller-Urey experimentCreated conditions of early Earth and synthesized amino acids1
151612056794 Steps of Life1. Amino acids and nitrogenous bases formed from small molecules (monomers) 2. Amino acids joined to form proteins; nitrogenous bases joined to form nucleic acids (polymers) 3. Protocells formed- membranes with polymers 4. Self-replicating molecules allowed the inheritance of traits2
15161244364GenomeThe total amount of DNA in an organism or virus (coding and non-coding DNA)3
15161255381AlignmentLining up the genes from different species can show how closely they are related4
15161274526Comparing genomesAlignment show when nucleotides (DNA/RNA) or amino acids (proteins) are the same in different species5
15161296105Conversed processes: Genetic Code1. All organism have some sort of DNA 2. Organisms use the same nucleotides (A, C, T, G) in their DNA 3. Organisms transcribe DNA into RNA and translate RNA into protein6
15161314819Hox genes-Found in multiple organisms to drive animal development showing Hox expression - Indicate other cells to express proteins7
15161337209Metabolic PathwaysConserved core process8
15161341696GenotypeThe set of alleles in an organism (AA, Aa, aa)9
15161353699PenotypeObservable physical and physiological traits determined by genotype (tall, purple, blood type AB).10
15161383181Darwin's theory of Natural Selection1. Individuals with a population differ 2. The differences are, at least in part, passed from parents to offspring 3. Some individuals are more successful at surviving and reproducing than others 4. The successful individuals succeed because of variant traits they have inherited and will pass onto their offspring11
15161451960Genetic variation1. New alleles (mutation) 2. Changing gene number or position (duplication, translocation) 3. Rapid reproduction (bacteria) 4. Sexual reproduction (recombination)12
15161476079Caution!!!!!!Environments do NOT change genotypes- enviroments select some phenotypes for survival13
15161496827AdaptationA gene (trait or characteristics) that is inherited by an organism that increase the chances of successful reproduction and survival in an environment14
15161520308Genetic VariationDiffering genotypes or alleles in a population leading to different features/ characteristics/ phenotypes expressed15
15161537643FitnessA measure of how well a genotype results in future offspring (reproductive success)16
15277270774Genetic variationDiffering genotypes or alleles in a population leading to different features/characteristics/ phenotypes expressed17
15277288809Chance & EvolutionChance and random events can also affect evolution18
15277305916Types of environmental pressure1. Overpopulation 2. Changing environment 3. Resource competition 4. Predators (over population of predators)19
152773268123 Types of Natural SelectionDirectional, Stabilizing and Disruption Selection20
15277354812Directional SelectionNatural selection that favors genes to the left or right of the mean variant21
15277370103Stabilizing selectionNatural selection that favors the mean variant in the population22
15277422698Disruptive selectionNatural selection that favors the genes to the left and right of the mean variant in the population23
15277448181Sexual selectionForm of natural selection where individuals with certain inherited traits are more likely to mate24
15277456670Balancing selectionNatural selection that maintains variation by keeping unfavorable recessive alleles in a population25
15277481350SpeciesA population of organisms whose members interbreed in nature to produce viable, fertile offspring26
15277503752SpeciationAn evolution process where one species splits into two or more species27
15277512945Adaptive radiationEvolutionary change where organisms from new species with adaptations that fill different ecological roles(niches) in a community28
15277541556Speciation ratesSpeciation rates vary over time, especially when adaptive radiation allows organisms to enter new niches29
15277559900ExtinctionExtinction occurs rapidly at time of ecological stress30
15277576415Allopartic speciationA population is divided by geographic isolation, resulting in speciation31
15277617979Sympatric speciationA population forms a new species in the SAME geographic location32
15277639869PolyploidyAn event where cells inherit extra chromosomes (poly=many; ploid=chromosome number) resulting in a new species33
15277663449HomologySimilar structures or processes resulting from common ancestry (decent with modification)34
152776749193 types of homology1. An atomical (Limbs) 2. Molecular (DNA or protein sequence) 3. Developmental (Cell division)35
15277702365BiogeographyThe study of geographic variation in nature from genes to entire communities and ecosystems - Geographic distribution of species: evidence for evolution36
15277731240Reproductive isolationThe existence of biological factors( barriers) that prevent two different species from forming viable, fertile offspring37
15277751439ZygoteThe diploid cell produced by haploid cells after fertilization38
15277755767Prezygotic barriersBarriers to reproduction before successful fertilization39
15277771556Post zygotic barriersBarriers to reproduction following successful fertilization40
15277788164Hybrid zoneArea where two species meet and mate producing some mixed offspring41
152778078153 outcomes of hybrid zones1. Reinforcement: barriers is stronger 2. Fusion: barriers is weakened 3. Stability: hybrid organisms continue to form42
15277827869PopulationGroup of individuals that live in the same area and interbreed, producing fertile offspring43
15277836897Gene poolAll copies of every type of allele in a population44
15277849729Allele frequencyHow often an allele (R or r) is seen in a population45
15277860391GenotypeHow often a genotype (RR,Rr, or rr) is seen in a population46
15277870715Hardy-Weinberg equilibriumWhen allele frequencies in a population remain constant47
152788488075 Assumptions of Hardy-Weinberg Equilibrium1. No selection (no sexual or natural selection) 2. No mutation 3. No migration (prevent genetic drift & gene flow) 4. Large population (less shifting in the frequency) 5. Random mating (gets rid of sexual selection)48
15278893033Calculating allele frequencyp+q=1 p²+2pq+q²=1 p² + 2pq= Dominant phenotype q²= recessive phenotype49
152789223883 main causes of evolutionary change1. Natural selection 2. Genetic drift 3. Gene flow50
15278930864Genetic driftChance events that cause allele frequencies to change, resulting in evolution51
15278942001Founder effectType of genetic drift where a few organisms are isolated from a population and establish a new population52
15278978555Bottleneck effectType of genetic drift where a severe drop in a population number causes some alleles to become favored53
15278993007Gene flowTransfer of alleles in or out of a population due to immigration or emigration, resulting in evolution54
15279004185PhylogenyEvolutionary history of a species or group of species55
15279010998TaxonomyScientific discipline that names and classifies organisms56
15279018746Phylogenetic treeBranching diagram that shows the evolutionary history of the organism57
15279034710AnalogySimilarity due to convergent evolution, or the independent evolution of shared traits58
15279051450Two types of homology1. Morphological homology 2. Molecular homology59
15279070023Morphological homologyClosely related species share morphological homology (similar limbs, etc) - Phenotype60
15279112292Molecular homologyClosely related species share identical or similar DNA sequences -Genotype61
15279130368Shared ancestral characterTrait from an ancestor of the clade (backbone)62
15279137153Shared derived characterEvolutionary novelty shared by a clade (mammal hair)63
15279143344Maximum parsimonybuilding evolutionary trees with the fewest morphological or molecular events (simplest explanation)64

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