Quizlet

Flashcards: quiz 5

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moduleunits of body construction
heterochromycomparing different species, an alternation in the timing of developmental events, leading to different results in adults
developmental plasticitythe capacity of an organism to alter it's pattern of development in response to environmental conditions.
parallel phenotypic evolutionrepeated evolutionary patterns of change that occur independently in multiple lineages
differential survivalthose individuals in a population that are the most fit can survive.
populationany group of organisms coexisting at the same time and in the same place and capable of interbreeding with one another
adaptationa paticular structure , physiological process or behavior that makes an organism better able to survive and reproduce
gene poolall the different alleles of all the genes existing in all individuals of a population
population bottlenecta stressful period during which only a few individuals of a population survive
gene flowexchange of genes btwn diff species (extreme refers to hybridization) or btwn different populations of the same species caused by migration followoed by breeding.
founder effectrandom changes in allele frequencies resulting from establishment of a population by a very small number of individuals
artificial selectionselection by plant and animal breeders of individuals with certain desireable traits
natural selectiondifferential contribution of offspring to the next generation by various genertic types belonging to the same population
stabilizing selectionselection against the extreme phenotypes in a population so that the intermediate types are favored
directional selectionselection in which phenotypes at one extreme of the population distribution are favored
disruptive selectionselection in which phenotypes at both extremes of the population distribution are favored
sexual selectionselection by one sex of chracteristics in individuals of the opposite sex. also the favoring of characteristis in one sex as a result of competition among individuals of that sex for mates.