Transcript While these spiders look very different, they are all a part of the

Photo by Theuerkauf
Photo by P. Kuczynski
Moth Photos by Olaf Leillinger
Mutated gene
results in brown
allele
Brown insects are more likely to survive, so the
frequency of this allele increases in the population.
Moth Photos by Olaf Leillinger
Photo by Olaf Leillinger
Photo from Kettlewell, 1959
Moth Photos by Olaf Leillinger
Methicillin-resistant
Staphylococcus
aureus
Antibiotic Resistance in Bacteria
A mutation creates a new
allele
which increases in frequency.
While these
spiders look very
different, they are
all a part of the
same species and
can reproduce with
each other.
Photos courtesy of Rosemary Gillespie, UC Berkeley
Two species of squirrel that adapted to different regions.
Photo by Harvey Barrison
Photo by Mark Putney
Photo by Mark Putney
Photo by Michael Dvorak
Photo by Harvey Barrison
Photo by Mark Putney
Photo by Mark Putney
Photo by Michael Dvorak
Photo by Harvey Barrison
Photo by Mark Putney
Photo by Mark Putney
Photo by Michael Dvorak