Alleles

[Lanell]

Different versions of a gene, of which code for different versions of a characteristic.

If the alleles in a mtching pair are the same, they are called [homozygous] alleles.

If the alleles in a matching pair are different, they are called [heterozygous] alleles.

Some alleles are dominant to other forums of a gene and will always be expressed.

Some alleles are [recessive] to other forms of the gene and will rarely be expressed.

[Julene]

a gene that is found in one of two or more different forms in the same position in a chromosome , and so produces a particular characteristic that can be different for different people, such as eye colour