Dominant trait - Capital letter, Recessive trait - Small letter, Genotype - Set of genes responsible for a particular trait e.g. Bb, Phenotype - Physical characteristic of individual e.g. green eyes, Tall (T) (homozygous) - TT, Small (t) - tt, Tall (T) (heterozygous) - Tt, Chromosome - Thread-like structure found in nucleus of cell, 23 - Number of chromosomes in sex cell, 46 - Number of chromosomes in a cell, Gene - Short section of DNA found on chromosome , Non-inherited trait - Good at sport, Inherited trait - Brown hair,

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