allele - different form of a gene, gene - section of DNA coding for a protein (characteristic), genotpye - i.e. homozygous dominant / recessive or heterozygous, pheynotype - physical characteristic seen , recessive - characteristic that is only found when both alleles are presetent, homozygous - same alleles in homologous chromosomes, heterozygous - both dominant and recessive allele present, co-dominance - both alleles are expressed in the phenotype , dominant - this allele expressed in either heterozygous or homozygous state, gametes - sex cells carrying haploid genetic information, polygenes - More than one gene coding for a particular phenotype, purebred - containing homozygous dominant genotype,

genetic definitions iGCSE

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