Table 1.

Expected and observed offspring genotype ratios for each combination of parental genotypes. (Also provided are the p-values and 95% confidence intervals (CI) from binomial exact tests assuming the Mendelian expectation of a 50 : 50 ratio within each combination.)

parent genotype combination (female : male)	offspring sex	expected offspring genotype	number of offspring	observed proportion of offspring genotypes	exact binomial test for Mendelian expectations
					p	95% CI
A : AB	male	AA, AB	29, 21	0.58, 0.42	p = 0.32	0.43–0.72
	female	A, B	42, 42	0.5, 0.5	p = 1	0.39–0.61
A : AC	male	AA, AC	21, 20	0.51, 0.49	p = 1	0.35–0.67
	female	A, C	15, 28	0.35, 0.65	p = 0.07	0.21–0.51
A : BC	male	AB, AC	13, 8	0.62, 0.38	p = 0.38	0.38–0.82
	female	B, C	26, 23	0.41, 0.59	p = 0.34	0.26–0.58
B : AB	male	AB, BB	29, 31	0.48, 0.52	p = 0.90	0.35–0.62
	female	A, B	28, 38	0.42, 0.58	p = 0.27	0.30–0.55
B : AC	male	AB, BC	16, 7	0.7, 0.3	p = 0.10	0.47–0.87
	female	A, C	14, 14	0.5, 0.5	p = 1	0.31–0.69
B : BC	male	BB, BC	24, 13	0.65, 0.35	p = 0.10	0.47–0.80
	female	B, C	18, 14	0.56, 0.44	p = 0.60	0.38–0.74
C : AB	male	AC, BC	14, 11	0.56, 0.44	p = 0.69	0.35–0.76
	female	A, B	22, 28	0.44, 0.56	p = 0.48	0.30–0.59
C : AC	male	AC, CC	6, 12	0.33, 0.67	p = 0.24	0.13–0.59
	female	A, C	18, 24	0.43, 0.57	p = 0.44	0.28–0.59
C : BC	male	BC, CC	9, 5	0.64, 0.36	p = 0.42	0.35–0.87
	female	B, C	5, 5	0.5, 0.5	p = 1	0.19–0.81