Unit 7: Evolution
Terms in this set (48)
A population of organisms can change over generations if individuals having certain heritable traits leave more offspring that others.
Trait shaped by natural selection that increases an organism's natural success.
Change in genetic composition of a population over time.
Binomial nomenclature system.
Classification for living things.
God created a new set of species after each one.
Environment could bring inherited change.
Wrote principles of geology.
Supported theory of geological change.
Structures that are anatomically similar because the traits evolved together.
Structures that are anatomically similar but the traits evolved separately.
Physical features that are reduced and unused
Similarities in genes and proteins that show relatedness
Changes in DNA introduce variation in population.
Movement of alleles between populations.
Mating that does not occur by chance.
Change in allele frequency due to chance.
Sudden shrinking of population. Ex. Natural disasters
A small population is separated from another population.
Intermediate phenotype favored.
Extreme phenotype is favored.
Two or more phenotype favored.
A group of organisms that can breed amongst each other and produce fertile offspring.
Species occur in different areas.
Species occur during different times of day, different seasons, etc.
Unique patterns and rituals isolate species.
Morphological differences in reproductive organs prevent successful mating.
Sperm of species not able to fertilize eggs of another species.
Zygote cannot develop.
Hybrid offspring cannot produce fertile offspring. (Children sterile)
Hybrids can have offspring, but they are not fertile. (grandchildren sterile)
Physical barrier between organisms.
Many species evolve from a single species.
Speciation takes place in the same geographic place.
Organisms evolve gradually through small changes over a long time.
Organisms evolve quickly due to sudden environmental changes.
Theory of inheritance of acquired characteristics.
If an organism changes during life in order to adapt to its environment, those changes are passed on to its offspring.
Hardy Weinberg equation
Frequency of AA
Frequency of A
Frequency of aa
Frequency of a
Frequency of Aa
Change in gene frequencies between populations of a species over time.
Large scale evolutionary change, such as the formation of a new species.
Results in increased frequency of homozygotes in all gene loci.
Results in increased frequency of homozygotes at only certain loci.
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