More Evolution: who, what, how •Exam key posted on class webpage •Check out Bonuses on class webpage
Feb 25, 2016
Evolution: A species’ genetic component changes as the individuals reproduce. These changes are based on how the DNA changes and who reproduces.
Evolution can occur via several processes.One common process is
Natural Selection:Individuals that are most successful at
reproducing will pass on more of their genetic information.
Natural Selection can only occur when both of these conditions are met:•Genetic diversity gives rise to individuals
with different traitsand
•Not all individuals can reproduce equally
Evolution: A species’ genetic component changes as the individuals reproduce. These changes are based on how the DNA changes and who reproduces.
Who evolves?…Species.
•A population that can produce fertile offspring
•A population that does reproduce
**A population sharing genetic information**
A. harrisi A. leucurus
Fig 24.6
Who evolves?…Species.
•A population that can produce fertile offspring
•A population that does reproduce
**A population sharing genetic information**
A. harrisi A. leucurus
Fig 24.6
Natural Selection:Individuals that are most
successful at reproducing will pass on more of their genetic
information.
Flies raised in different environments prefer to mate with individuals
from the same environment...
Separation does not need to be geographic
Fig 24.9
Flies raised in different environments prefer to mate with individuals from the same environment...
Fig 24.9