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25 terms

chap.16 bio

Population genetics
the study of evolution from a genetic change point of view
gene pool
genetic information avalible in a population
allele frequency
frequency among a certain allele in a population
phenotype frequency
frequency of an individual phenotype in a population. with a particular phenotype
Hardy-Wenberg genetic equilibrium
allele frequency in a population remain the same generation to gene ration
the smallest unit in which evolution occurs is
a population
Length,weight, and many other quantitive traits in a population tend to show variation that, when plotted on a graph looks like.
a bell curve
If a population of four o'clock flowers consists of five RR plants(red flowers, two Rr plants(pink flower), and one rr plant9white flowers, the phenotype frequency of plants with pink flowers is.
For a population to be in genetic material
individuals must not enter or leave the population
immigration= movement of individuals into a population.
emigration- individuals out of a population
gene flow,genetic drift
gene flow= movement of genes form one population to another.
Genetic drift= strongly felt in small populations. A random change in allele frequency.
random mating, assortative mating
random mating=occurs without regard to genetic make up.
assortative= mating based on similar characteristics
stabilizing selection,directional selection
stabilizing selection=individuals average traits best fit.
directional selections=one extreme or the other extreme is selected for. Has highest fitness.
one limitation of the morphological species concept is that
there can be morphological diffrences among individuals in a single population
according to the biological species concept, a species is a population of organisms that
can successfully interbreed but cannot breed with other groups
fish populations that do not not interbreed because the live in diffrent ponds may evolve into separate species due to
geographic isolation
a pattern of rapid evolutionary changes followed by long periods of no change is described as
punctuated equillibrium
interna and external structures and the apperance of organisms. used to classaify organisms.
geographic isolation
physical seperation of the members of a population
punctuated equilibrium
pattern of species formatin in which periods of speciation are presede and followed by log periond little of no specifation
any violation of the conditions necessary for Hardy-Weinberg equilibrium can result in
The movement of reproductive individuals from one population to another is a result in
gene flow
genetic drift is most likely to occur in
small populations
assortive mating occurs when
an individual chooses mattes that ar similar to itslef
startlings produce an average of five eggs in each clutch. If there are more than five, the parents can not adquately feed the young. If there are fewer than five, predators may destroy the entire clutch. This is an exampl of.
stabilizing selection