Speciation 1 Flashcards
Biological Species Concept
This defines species as groups of actually or potentially interbreeding natural populations that are reproductively isolated from other such groups
Temporal isolation
Mating or flowering at different seasons or at different times of the day
Behavioral isolation
Species have different mating rituals
Ecological isolation
Species utilize different resources in the habitat
Mechanical isolation
Structural differences prevent mating or pollen transfer.
Geographic isolation
species occur in different places
prevention of gamete fusion
structural differences prevent mating or pollen transfer
Hybrid Inviability
Prevents interbreeding between populations when their hybrids die young or are unable to reproduce
adult hybrids can not reproduce due to mating behaviors that are a mixture of two parents
Hybrid Inviability
Bishop and Monterey pines will interbreed in the lab but not in nature due to differing pollination times
Temporal Isolation
What are the three steps after fertilization in Postzygotic Isolation Mechanisms that offspring have to go through?
Bad development, don’t survive in nature (SOTF), sterile or reduced fertility
Means that alleles do not move between the gene pools of different species
Independent evolution