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KS3 DNA GENES AND VARIATION

Horizontales
Type of allele which is only expressed if there is no dominant allele present.
Type of variation which has nothing to do with genes, e.g. where you grew up.
Controlled by genes, e.g. hair colour and eye colour.
A short section of a chromosome.
Type of variation which varies over a range of values.
Type of allele which is always expressed.
Verticales
Different forms of the same gene.
Type of variation which is passed down from your parents, e.g. hair colour.
Shows that there are different genes in different species.
Type of variation which can only take certain values.
Long coiled molecule of DNA.