DNA

A type of molecule that genes and chromosomes are made of.

Claim

A proposed answer to a question about the natural world.

Allele

A specific form of gene that provides instructions for making a particular protein molecule.

Trait

A specific characteristic of an individual organism.

Variation

Any difference in traits between individual organisms

Sexual Reproduction

The process in which two parents pass on their genes to create new offspring.

Mutation

A random change in a gene that sometimes results in a new trait.

Homozygous

Having gene versions that are the same.

Heterozygous

Having gene versions that are different.