Genotype | Observed number | Expected number |
AA (β/β) | 8261 | 8191 |
AS (β/βS) | 901 | 983 |
SS (βS/βS) | 60 | 29 |
AC (β/βC) | 1852 | 1908 |
SC (βS/βC) | 144 | 114 |
CC (βC/βC) | 119 | 111 |