Transcript Mechanisms of Evolution

What we
know now
that
Darwin
didn’t
More than 99% of all
species that have ever
lived are now extinct.
New species formed to
take their place.
HOW???
Speciation-
What drives this ‘speciation’?
ISOLATING MECHANISMS
• Behavioral• Geographical• Temporal-
For evolution to take
place, something must
upset the genetic
equilibrium of a
population.
Hardy- Weinberg
Principle
The frequency of alleles in a
population will remain
constant unless one or more
factors cause those
frequencies to change.
In other words…
Five conditions required for
equilibrium1.
2.
3.
4.
5.
Mechanisms of
Evolution
Directional, Stabilizing, and
Disruptive Selection
Genetic Drift
Patterns of Evolution
Adaptive Radiation
Convergent Evolution
Co-evolution
Punctuated Equilibrium
Extinction
Artificial Selection