Table 1.

Genotypes of animals from heterozygous crossings at 7-dpf to 6-mpf.

Age of Animals	+/+	+/−	−/−	p Value *
7-dpf	23	20	12	0.59
14-dpf	14	26	15	0.70
21-dpf	20	21	15	0.76
1-mpf	45	83	30	0.081
2-mpf	28	62	14	0.0066
3–6-mpf	169	264	38	2.13 × 10−17

* Chi-square analysis for homozygous animals expected at 25%.