Table 2.

Nine Genotypes, Possible Diplotypes Within Each Genotype, and Their Frequencies at Two SNPs

Genotype
XbaI	PVUII	Possible Diplotype	Diplotype frequency Expected	Relative Frequency within each genotype	Observed Frequency	Risk Type
GG	CC	[GC][GC]	P[GC][GC] = P2[GC]	1	10	[GC][GC]*
GG	CT	[GC][GT]	P[GC][GT] = 2P[GT]P[GC]	1	29	$[\text{GC}][\overline{\text{GC}}]$ †
GG	TT	[GT][GT]	P[GT][GT] = P2[GT]	1	16	$[\overline{\text{GC}}][\overline{\text{GC}}]$ ‡
GA	CC	[GC][AC]	P[GC][AC] = 2P[GC]P[AC]	1	34	$[\text{GC}][\overline{\text{GC}}]$ †
GA	CT	[GC][AT]	P[GC][AT] = 2P[GC]P[AT]	π		$[\text{GC}][\overline{\text{GC}}]$ †
		[GT][AC]	P[GT][AC] = 2P[GT]P[AC]	1−π	173	$[\overline{\text{GC}}][\overline{\text{GC}}]$ ‡
GA	TT	[AT][GT]	P[GT][AT] = 2P[GT]P[AT]	1	18	$[\overline{\text{GC}}][\overline{\text{GC}}]$ ‡
AA	CC	[AC][AC]	P[AC][AC] = P2[AC]	1	10	$[\overline{\text{GC}}][\overline{\text{GC}}]$ ‡
AA	CT	[AC][AT]	P[AC][AT] = 2P[AC]P[AT]	1	8	$[\overline{\text{GC}}][\overline{\text{GC}}]$ ‡
AA	TT	[AT][AT]	P[AT][AT] = P2[AT]	1	2	$[\overline{\text{GC}}][\overline{\text{GC}}]$ ‡

^*[GC][GC], no presence of risk type

^† $[\text{GC}][\overline{\text{GC}}]$, presence of only 1 risk type

^‡ $[\overline{\text{GC}}][\overline{\text{GC}}]$, double presence of risk type.