If provided, all loci with a likelihood greater than this criterion
will be selected.
FDR
If provided (and likelihood is not provided), the maximal set of
loci which controls the FDR at this level is selected.
FWER
If provided (and likelihood and FDR are not provided), the maximal set of
loci which controls the FWER at this level is selected.
perReplicate
If TRUE, selection of loci is done on a replicate by replicate
basis. If FALSE, selection will be done on the likelihood that the
locus represents a true locus in at least one replicate group.