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NV APES - Living World
Section 2 of the AP Outline Review Flashcards
5
Environmental Studies
12th Grade
02/25/2011

Additional Environmental Studies Flashcards

 


 

Cards

Term
bottleneck effect
Definition
genetic drift that occurs when a population is drastically reduced in size. Some alleles may be lost from the gene pool as a result of random events.
Term
founder effect
Definition
Changes in allelic frequencies that occur when a small group is separated from a large population and establishes a colony in a new location
Term
allopatric speciation
Definition
the formation of new species as a result fo an ancestral population's becoming isolated by a geographical barrier
Term
reproductive isolation
Definition
 the collection of mechanisms, behaviors and physiological processes that prevent the members of two different species that cross or mate from producing offspring, or which ensure that any offspring that may be produced is not fertile.
Term
sympatric speciation
Definition
The increased reproductive isolation between two closely related species when they live in the same geographic region
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