One form of a visible characteristic or behaviour determined by a particular allele

Slight differences in an organism’s traits that are considered normal

An increase in the proportion of the individuals of a species that possess a necessary trait, allowing the species to survive a change in an environmental factor

An organism’s physical surroundings, such as food supply, soil, weather, water, trees, and mountains

Different forms of the same gene that contain slightly different genetic information for slightly different traits

An allele that will produce a trait that masks another (recessive) trait for the same characteristic

An allele that produces a trait that is masked by a dominant trait

The genes that determine an organism’s phenotype

The physical appearance, behaviour or trait of an organism

The physical appearance, behaviour or trait of an organism

When all individual organisms of a species have died

An increase in the proportion of the individuals of a species that possess a necessary trait, allowing the species to survive a change in an environmental factor

Food supply, soil, weather, water, trees, and mountain are part of...

Containing two of the same alleles

Containing two different alleles

A change in an organism’s environment that selects for organisms with slight differences in a trait that give that organism a survival or reproductive advantage

Environmental pressures often give an organism with a favorable trait an advantage over other organisms without the trait.

Also called Survival of the Fittest

A slow progression of changes in organisms over time due to natural selection and environmental pressure

The organism with the trait is selected by the pressures and is able to survive and reproduce, but the organism without the trait cannot and is eventually forced into extinction.

A natural process resulting in the evolution of organisms best adapted to the environment.

Scientist who developed the theory of natural selection

Diagram that is used to predict the genotypes of two particular organisms

Scientific term for the children of two organisms