Table 2. Alleles with modest alterations in developmental regulator gene coding repeat length are common in natural populations of placental mammals.

Species	Panel size	No. of Runx-2 alleles	No. of Dlx-2 alleles	No. of Twist-1 alleles
Canis lupus (gray wolf)	70	5	5	16
Canis latrans (coyote)	98	7	5	17
Vulpes vulpes (red fox)	10	4	1	1
Vulpes velox (swift fox)	1	1	2	2
Alopex lagopus (Arctic fox)	2	2	3	3
Enhydra lutris (sea otter)	3	2	2	3
Lontra canadensis (river otter)	1	2	1	2
Ursus maritimus (polar bear)	2	1	1	2
Ursus arctos (brown bear)	2	1	1	1
Odobenus rosmarus (walrus)	2	2	2	1
Sylvilagus floridanus (Eastern cottontail rabbit)	2	1	2	1
Lasionycteris noctivagans (gray-eared bat)	1	2	2	1