Shared Flashcard Set

Details

Evolution: Speciation (11.5, page 343, 11.3)
Based on the McDougal Littell Biology Textbook
10
Biology
9th Grade
02/16/2010

Additional Biology Flashcards

 


 

Cards

Term
What is speciation?
Definition
It is the evolution of a new species.
Term
If a bird from a population of AA birds travels to a population of aa birds and introduces the AA allele there, what is this called?
Definition
Gene flow- the movement of allele's from one population to another.
Term
What does gene flow cause?
Definition
It keeps differing populations similar and increases the variations in populations.
Term
If a hurricane destroys eighty-five percent of the population on an island and the fifteen percent that are left survived by chance, what if this called?
Definition
Genetic Drift-changes in gene pool due to chance (not natural selection)
Term
What is geographic isolation and is there any gene flow in geographic isolation?
Definition
Geographic isolation is when mountains, rivers, oceans, and/or (but not limited to) canyons separate population. There is no gene flow.
Term
What is the founder effect?
Definition
This is the genetic drift that occurs when a small number of individuals colonize a new area.
Term
What is it called when organisms aren't geographically isolated by can't reproduce because of different mating rituals and the use of pheromones?
Definition
Behavioral isolation
Term
If two organisms are unable to reproduce because they have different mating seasons and one organisms is nocturnal, what is this called?
Definition
Temporal isolation
Term
What is the end result of behavioral, geographical, and temporal isolation?
Definition
Reproductive isolation. Two organisms that are unable to reproduce with each other, species.
Term
What are the five factors that can lead to evolution?
Definition
Genetic drift, Gene flow, Mutation, sexual selection, and natural selection. (GGMSN)
Supporting users have an ad free experience!