multiple alleles

• Allele - A version of a gene
• Dominant - Describes an allele that is always expressed. Represented by a capital letter
• Recessive - Describes an allele that is only expressed in the absence of a dominant allele. Represented by a small letter
• Genotype - An organism’s genetic composition. Describes all alleles
• Non-Mendelian means characteristics that don’t follow the standard dominant and recessive rules established by Mendel
• Co-dominance is where both dominant alleles are expressed leading to a phenotype that is neither dominant or recessive.