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25 July, 09:02

Describe how alleles and genes are related.

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  1. 25 July, 09:07
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    A gene is a stretch of DNA or RNA that determines a certain trait. Genes mutate and can take two or more alternative forms; an allele is one of these forms of a gene. Chromosomes occur in pairs so organisms have two alleles for each gene one allele in each chromosome in the pair.
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