dominant - always expressed, even if only one copy is presentse alleles present , recessive - only expressed if two copies are present (therefore no dominant allele present), homozygous - two identical alleles for a trait, heterozygous - two different alleles for a trait, gene - a small section of DNA on a chromosome that codes for a particular sequence of amino acids, to make a specific protein, allele - a form/version of a gene, genotype  - the combination of 2 alleles which operate at a molecular level to develop characteristics that can be expressed as a phenotype, phenotype - the expressed characteristic/trait, gamete - cells formed by meiosis e.g. sperm and egg cells in animals, pollen and egg cells in flowering plants , chromosome - a structure formed of DNA, containing many genes,

Inheritance key terms

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