Table 1.

Structure and frequency of the six most common normal alleles identified among 5,623 alleles obtained from this pan‐ethnic study sample

Repeat tract length	Repeat structurea	Frequency
20	10A9	0.062
23	13A9	0.031
29	9A9A9	0.174
30	10A9A9	0.339
31	10A9A10	0.049
32	9A12A9	0.021

^aNumbers represent the number of CGG triplets; A represents an AGG interruption.