The Journal of Insect Science: Volume 1/Article 1/Table 2

Table 2 Segregation of scale and eye color in dihybrid cross of Heliothis virescens; combined results of 7 pair matings of Yyes/Dalzell98 x Yyes/Dalzell98.

	Parental Phenotype		Recombinant Phenotype
	Yellow scale Yellow eye	Green scale Green eye	Yellow scale Green eye	Green scale Yellow eye	chi squared
Observed	122¹	298	96	0
Unlinked³	32.25	290.25	96.75	96.75	347**²
Linked⁴	258	258	0	0	78**
Unlinked with lethal⁵	32.25	290.25	96.75	0	250**
Unlinked y,yes⁶	129	290.25	96.75	0	0.611

¹Number of adults
²**=Significant at p <0.001
³Expected results for a model in which there are two independently assorting genes, one gene controlling yellow scales and another gene controlling yellow eyes.
⁴Expected results for a model in which two genes, one controlling yellow scales and another controlling yellow eyes, occupy the same chromosome. The special case of lack of recombination in female lepidopterans is discussed in the text.
⁵Expected results for a model in which there are two independently assorting genes, one gene controlling yellow scales and another gene controlling yellow eyes. Zygotes in one recombinant class (green scale with yellow eye) die.
⁶There are two independently assorting genes, y confers yellow scales only and yes confers both yellow eyes and yellow scales.