Genetics Vocabulary

A form of a gene

• Allele

• Genotype

• Phenotype

When both alleles in a gene pair are fully expressed, the phenotype shows a combination of the traits

• Incomplete Dominance

• Recessive

• Codominance

When one allele masks the expression of the other allele

• Dominance

• Recessive

• Incomplete Dominance

The genetic makeup of an organism

• Phenotype

• Genotype

• Heterozygous

An individual with two different alleles for a particular trait

• Homozygous

• Heterozygous

• Recessive

An individual with two identical alleles for a particular trait, whether both alleles are dominant or recessive

• Independent Assortment

• Heterozygous

• Homozygous

Neither allele is completely dominant, the phenotype is a blend. Example: White rose crossed with a red rose produces a pink rose

• Incomplete Dominance

• Heterozygous

• Homozygous

• Codominance

A characteristic expressed only when two copies of the allele are present in the genotype

• Recessive

• Dominant

• Inheritance

A characteristic influenced by the combined effects of multiple genes

• Codominance

• Recessive Trait

• Polygenic Trait

The physical expression of an organism's genes

• Genotype

• Phenotype

• Dominance