See Pete's post about the genetics of the mites and the effect of
recombination and mutation.
Just as with drone bees, all the sperm of a male mite will be clones of the
male.
The male inseminates his sisters, which may differ genetically from each
other due to recombination and being diploid.
A male may, but does not necessarily, mate with his mother.

-- 
Randy Oliver
Grass Valley, CA
www.ScientificBeekeeping.com

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