Physical map

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A physical map, in genetics, tells you how much DNA separates two genes and is measured in basepairs, as opposed to a genetic map which tells you the positions of genes in relation to each other based on the frequency of crossing overs. The distance of a physical map is measured by what is called base pairs.


Also, a physical map can show identifiable landmarks such as mountains, rivers, lakes, oceans, and other permanent geographic features.

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