Difference between Jaccard and Dice coefficient

Question: 

What is the difference between the Jaccard and Dice coefficient for band matching?

Answer: 

The Jaccard and Dice coefficients are very similar, even so that dendrogram topology will not differ. The only difference is in the branch lengths. Usually, there is a slight preference for the Dice coefficient, because this coefficient is the same as the Nei & Li coefficient, known to be the most suitable coefficient to determine genetic relatedness based upon DNA restriction fragment patterns. See Nei, M. and W.-H. Li. 1979. Mathematical model for studying genetic variation in terms of restriction endonucleases. Proc. Natl. Acad. Sci. USA 76: 5269-5273.

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