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Making chromosome maps

Finding new genes is much easier with chromosome 'maps', which show the position of known DNA 'landmarks'. To make a map, scientists first break the DNA from many copies of the same chromosome into pieces. Then, by matching up the landmarks on overlapping fragments of DNA, they put the map together. It is a bit like putting together lots of overlapping photographs to make one big picture.

Making a chromosome map is a bit like putting together lots of overlapping photographs to make one big picture.
Making a chromosome map is a bit like putting together lots of overlapping photographs to make one big picture.
Nicky Lewis

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