Genetics and evolution

What are mutations?

• A change in the sequence of DNA or gene

• How proteins are made in the body

• The different traits in a population

What is genetic variation?

• When traits are the same

• Different forms of a trait, such as blonde hair and brown hair

• A large amount of DNA

Mutations can lead to genetic variation.

• True

• False

What is the definition of species?

• A group of animals that live together.

• A group of organisms that can mate and their offspring are fertile.

• A group of organisms that have similar adaptations.

True or False: It is better for a population to have less genetic variation.

• True

• False

The more genetic variation a population has...

• The more likely it is that some will survive a change in the environment.

• The less likely it is that many will survive a change in the environment.

• Genetic variation has no real impact on environmental changes.

Organisms that have beneficial adaptations for survival will likely

• Live long enough to reproduce and pass on their traits.

• Live long enough to reproduce, but will not pass on their traits.

• Die off sooner and not have the opportunity to pass on their traits.

Before the industrial revolution, why were the lighter colored moths more common?

• They did not blend in well with their habitat, so they got eaten.

• They were not yet stained by all of the pollution.

• They blended in better with the lighter colored environment and did not get eaten.

When the environment around an organism changes, the traits that are considered beneficial may also change.

• True

• False

What is the theory that Charles Darwin came up with?

• natural selection

• Genetic inheritance of traits

• All living things are unrelated to each other