5 Mechanisms of Evolution

Front

Reindeer from a rancher in Alaska escape and mate with wild caribou. The offspring have traits for short legs and tame behavior.

Back

Gene Flow

Front

Males of the bighorn sheep species fight one another to show females who is the dominant male and are more likely to mate with females.

Back

Non-Random Mating

Front

During a hurricane, a population of beetles almost gets completely wiped out. The only beetles that survived were lucky that they were in their nest at the time of the hurricane and had enough food to survive. Options: Natural selection, Genetic Drift, Gene Flow, Non-Random Mating

Back

Genetic Drift

Front

How do insects become resistant to pesticides quickly?

Back

Natural Selection

Front

A chemical spill causes the offspring of ladybugs to have blue dots instead of black dots.

Back

Mutation

Front

A family from Sweden moves to India. A Swedish female marries an Indian male, and their offspring have blonde hair and blue eyes. What is this an example of?

Back

Gene Flow

Front

A certain type of plant can produce blue or yellow flowers. During a fire, many yellow flowers are destroyed and now since blue is the dominant trait, the plant reproduces offspring that produce only blue flowers.

Back

Genetic Drift

Front

Some organisms of a population of birds are born with extra-long beaks instead of a normal sized beak.

Back

Mutation

Front

In a habitat there are red bugs and green bugs. The birds prefer the taste of the red bugs, so soon there are many green bugs and few red bugs. The green bugs reproduce and make more green bugs and eventually there are no more red bugs.

Back

Natural Selection

Front

Females of a certain bird species are attracted to the mating calls of some male species more than others.

Back

Non-Random