A segment of DNA that codes for a general characteristic (but not the specific version). For example, this DNA segment might code for eye color.

This term represents the set of alleles an organism has for a specific gene.  Examples include heterozygous (Aa) and homozygous (AA or aa)

The observable characteristics of an individual resulting from the combination of alleles that it contains.

This organism has two different alleles for a gene.  The genotype of this individual is symbolized with one capital letter and one lower-case letter (Aa).

This organism has two of the same alleles for a gene.  The genotype of this individual is symbolized with either two capital letters (AA) or two lower-case letters (aa).

This term identifies an allele that overpowers another allele and therefore appears in the organism’s phenotype.

This term identifies an allele that is overpowered by another allele and therefore does not appear in the organism’s phenotype.

Some alleles don't show in an organism's phenotype because they are...

If an organism is heterozygous the ____ allele will show.

Actually showing brown hair is an example of an organism's...

If an organism has two different alleles for hair color, we would say that its ____ is heterozygous.

Hybrid is another name for...

Purebred is another name for...

Homologous chromosomes contain the same ___.

One of the chromosomes in a homologous pair may contain the dominant ____ for eye color.