Pre and Post Zygotic Barriers

Individuals from different species do not come in contact with each other EX: Polar and Grizzly Bears

What is Spatial Isolation? Example?

separated by physical barriers

What is allopatric?

ritual behaviors that prepare partners for mating example : birds with songs or dances

What is behavioral isolation? example?

proteins in eggs can only bond with sperm with other species example: external reproduction (sponges)

What is gametic isolation? example?

odd number of chromosomes prevent reproduction EX: mules (horse and donkey)

What is hybrid infertility? example?

incomplete genetic instructions that cannot complete zygote EX: sheep crossed with goat

What is hybrid inviability? example?

sex organs are incompatible between different species example : lock and key insects

What is mechanical isolation? example?

separated by by other factors besides physical

What is sympatric?

Timing of readiness Example: different flowering periods for flowers

What is temporal isolation? example?

allopatric and sympatric

What are the two types of speciation?

Hybrid inviability and infertility

What are the 2 post zygotic barriers?

Spatial, Behavioral, Mechanical, Temporal, and Gametic

What are the 5 prezygotic barriers?