Review Mechanism of evolution

Multiple Choice

Organisms with favorable
genetic variations survive
to reproduce and pass on
their genes.

• Natural Selection

• Mutation

• Non-random mating

• Gene flow

Multiple Choice

Random genetic
changes that occur in
an organism’s DNA

• Natural selection

• Genetic drift

• Gene flow

• Mutation

Multiple Choice

The alteration of allelic
(gene) frequencies by
chance events such as a
natural disaster or the
establishment of a new
population.

• Gene flow

• Mutation

• Genetic drift

• Non-random Mating

Multiple Choice

Mates are chosen based
on desired trait,
increasing the probability
that a specific allele will
be passed on to the next
generation.

• Genetic drift

• Non-random Mating

• Mutation

• Natural selection

Multiple Choice

The transfer of genes
from one population to
another population
through immigration or
emigration of individuals

• Mutation

• Non-random Mating

• Gene flow

• Natural selection

Multiple Choice

In a garden there were 3 colors
of butterflies: yellow, white, and
blue. The yellow and white
butterflies were able to blend in
with the flowers of the garden,
but the blue ones stood out and
were eaten by predators.

• Gene flow

• Natural selection

• Non-random Mating

• Mutation

Multiple Choice

Female peacocks are very
attracted to tail feathers that
are large and colorful. Because
the most colorful males are
getting all of the mates, the
following generation will have
more colorful peacocks.

• Non-random Mating

• Mutation

• Genetic drift

• Gene flow

Multiple Choice

In Ireland many people have red
hair. One year, there was a large
migration of individuals who
moved from Ireland to the United
States. After some time, the
frequency of red-haired people in
the U.S. increased

• Genetic drift

• Natural selection

• Non-random Mating

• Gene flow

Multiple Choice

A population of beetles consisted
of individual that were brown,
green, orange, red, and blue. A
storm swept through their
environment and randomly killed
off most of the green, orange, and
red beetles. The following
generation was mostly brown and
blue.

• Natural selection

• Mutation

• Non-random Mating

• Genetic drift

Multiple Choice

Among a generation of
tan-colored mice, one mouse had
a genetic variation causing them
to have black fur. This mouse was
well suited for its dark
environment, so it survived and
reproduced. The next generation
had more mice with black fur.

• Mutation

• Natural selection

• Gene flow

• Non-random Mating