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Evolution Flashcards
Karten in diesem Stapel (20)
- 1Consists of all the genes, including all the different alleles for each gene, that are present in a populationGene Pool
- 2The number of times an allele occurs in a gene pool, compared to the total number of alleles in that pool for the same geneAllele Frequency
- 3A trait controlled by only one gene; eg: shells with or without bands on snailsSingle-Gene Trait
- 4Trait controlled by two or more genes; eg: heightPolygenic Traits
- 5When individuals at one end of the curve have higher frequencies than individuals in the middle or at the other endDirectional Selection
- 6When individuals near the center of the curve have higher fitness than individuals at either endStabilizing Selection
- 7When individuals at the outer ends of the curve have higher fitness than individuals near the middle of the curveDisruptive Selection
- 8In small populations, individuals that carry a particular allele may leave more descendants than other individuals leave, just by chance. Over time, a series of chance occurrences can cause an allele to become more or less common in a population.Genetic Drift
- 9A change in allele frequency following a dramatic reduction in the size of a populationBottleneck Effect
- 10Allele frequencies change as a result of the migration of a small subgroup of a populationFounder Effect
- 11When a population is not evolving and allele frequencies in its gene pool do not changeGenetic Equilibrium
- 12Allele frequencies in a population should remain constant unless one or more factors cause those frequencies to changeHardy-Weinberg Principle
- 13Individuals select mates based on heritable traits, such as size, strength, or colorationSexual Selection
- 14Population or group of populations whose members can interbreed and produce fertile offspringSpecies
- 15Formation of a new speciesSpeciation
- 16Two populations that no longer interbreedReproductive Isolation
- 17Two populations that are capable of interbreeding develop differences in courtship rituals or other behaviorsBehavioral Isolation
- 18When two populations are separated by geographic barriers such as rivers, mountains, or bodies of waterGeographic Isolation
- 19When two or more species reproduce at different timesTemporal Isolation
- 20Comparing stretches of DNA to mark the passage of evolutionary timeMolecular Clock
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- 1 Honors Biology Honors (Evolution) Karteikarten am Evolution Flashcards, erstellt von Stefania Schoen am 19/04/2017.
- Erstellt von
- Stefania Schoen · Apr 2017
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- 19 Apr 2017
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