Gene - A small section of DNA that controls an inherited characteristic, Alleles - Different versions of the same gene, Genotype - The alleles present in an individuals genetic make-up, Phenotype - The characteristic that is expressed, Homozygous - Two identical alleles, Heterozygous - Two different alleles, Dominant - The allele is always expressed if present, Recessive - The allele is only expressed if dominant allele is NOT present in the genotype,

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