The joining of a sperm to an egg; the union of sex cells that produce an offspring

Both inherited alleles; the letters

The organisms physical appearance

The process of selecting a few organisms with desired traits to serve as parents of the next generation; organisms with desirable characteristics are mated

Features that have different forms in a population (Ex. humans - hair color)

A genetically determined characteristic (ex. brown hair, blond hair)

two parent cells join together to form offspring that are different from both parents

only one parent is needed; new cells are exact replica of parent cell

An organism having 1 dominant and 1 recessive allele for a trait; hybrid

An organism having 2 dominant or 2 recessive alleles for a trait; pure or purebred

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