Allele, a gene that is found in one of two or more different forms in the same position in a chromosome, and so produces a particular characteristic that can be different for different people, such as eye colour, Amino acids, proteins are made out of these, Characteristics, Special features about a particular animal or plant, Chromosomes, Long threads containing many genes, found in the nucleus of a cell, Clone, Group of cells or organisms that are genetically identical. They have all been produced from the same original cell, DNA, Deoxyribonucleic acid. A complex molecule that contains coded information to control inherited characteristics, Gene, a part of the DNA in a cell that controls the physical development, behaviour, etc. of an individual plant or animal and is passed on from its parents:, Genetic engineering, Changing the genes of an organism e.g. genes from humans can be added to bacteria, Genotype, an organism's complete set of genetic material, Heterozygous, when the alleles in a pair are different e.g. Aa. If the genes of the alleles are not the same - hybrid, Homozygous, when both alleles in a pair are the same e.g. AA or aa. If the alleles are the same - pure breeding., Phenotype, the set of observable characteristics or traits of an organism e.g. height, hair colour.

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