Inheritance - key terms

Allele

Allele

Different versions of genes.

Heterozygous

Where different alleles for a gene are present.

Homozygous

Where the same alleles for a gene are present.

Genotype

The alleles present within an individual for certain features.

Phenotype

Features of an individual that result from a particular genotype.

Dominant

The allele that always shows in the phenotype.

Recessive

The allele that only shows in the phenotype when two are present.

Codominance

Where different alleles both contribute to the phenotype