FIGURE 2. Differentially labelled sperm.

From the following article:

Sperm competition between Drosophila males involves both displacement and incapacitation

Catherine S. C. Price, Kelly A. Dyer and Jerry A. Coyne

Nature 400, 449-452(29 July 1999)

doi:10.1038/22755

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DAPI-stained sperm from a GFP male (green tails) and a bwD male (blue tails), dissected from the seminal receptacle of a single doubly inseminated female.

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