homozygous - a pair of alleles that are the same, heterozygous - a pair of different alleles, phenotype - how a characteristic is expressed, genotype - the combination of alleles that determine a characteristic, gene - a section of DNA that codes for a certain characteristic, allele - a form of a gene e.g brown and blonde for hair colour, nucleus - part of the cell where all the genetic information is contained, dominant - the allele for Polydactly is this, recessive - the allele for cystic fibrosis is this, chromosome - a collection of genes found in the nucleus, they occur in pairs with 1 from each parent,

inheritance

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