Table 2.

Distribution among loci and homozygous viability of singleton whole-body spontaneous mutations

Locus	Ref. 4	Ref. 5	This paper	Total
a	0	0	0	0
b	2	5  (5v)	8  (4v, 3xv, 1pl)	15
c	0	2  (1v, 1nt)	2  (1v, 1xv)	4
p	1	3  (2v, 1pl)	8  (6v, 1xpl, 1nt)	12
d	2	1  (1v)	12  (10 op, 2xv)	15
se	0	0	1  (1v)	1
Df(d se)	1	0	1 (1pl)	2
d se*	1	0	5  (5v)	6
s	2	0	9  (2v, 3jl, 4pl)	11

v, Viable; x, phenotype intermediate between stock allele and wild-type; op, opisthtonic and juvenile lethal; jl, juvenile lethal; pl, prenatal lethal; nt, not tested. 

^*See text for possible modes of origin.