Species
Groups of individuals that share attributes, but are distinct and reproductively isolated from other such
groups
What is vaguest possible definition of a species?
The divergence of biological lineages and the development of reproductive isolation between them.
What is speciation?
Having more than two sets of chromosomes.
What is polyploidy?
Locations where hybrids are produced
What art hybrid zones?
“Species are groups of actually or potentially
interbreeding individuals which are reproductively
isolated from other such groups”
What is the biological species concept?
Selection based on reproductive rate, rather than purely survival.
What is sexual selection?
What is diploidy?
Barriers that operate before fertilisation
Species being classified based on appearance
alone.
What is the morphological species concept?
Speciation involving a physical barrier to gene exchange
What is allopatric speciation?
Having four sets of chromosomes.
What is tetraploidly?
Populations in a hybrid zone interbreed, until they merge back into a single species.
What is hybrid fusion?
Species being organisms that fill the same niche.
What is the ecological niche concept?
Population divergence into multiple separate phenotypes.
What is directional selection?
Chromosome duplication within a single species
What is autopolyploidy?
Individuals of separate species come together they can produce viable hybrid offspring
What is secondary contact?
Species being the smallest groups of individuals on a life tree.
What is the phylogenetic species concept?
Speciation involving non-geographic barriers.
What is symmpatric speciation?
Chromosome duplication combining of the chromosomes of two different species.
What is allopolyploidy?
The exchange of genes between species.
What is introgression?