TABLE 1.

Interactions between e(y)1 constructions and y², e(y)1^u1, and e(y)3^u1 mutations^a

Genotype	Pigmentation of bristlesb				Survivalc
	Th	L	W	Ab
y2 e(y)1u1	1	2	5	5	ND
y2 e(y)1u1;P{e(y)1+}-1-5/+	5	5	5	5	ND
y2 e(y)1u1;P{Δe(y)1}-1/+	2	3	5	5	ND
y2 e(y)1u1;P{Δe(y)1}-2/+	3	3	5	5	ND
y2 e(y)1u1;P{Δe(y)1}-2/P{Δe(y)1}-2	4	5	5	5	ND
y2 e(y)1u1;P{Δe(y)1}-3/+	4	4	5	5	ND
y2 e(y)1u1;P{Δe(y)1}-2/P{Δe(y)1}-3	5	5	5	5	ND
y2 e(y)1u1;P{Δe(y)1}-4/+	3	4	5	5	ND
y2 e(y)1u1;P{Δe(y)1}-5/+	3	4	5	5	ND
y2w e(y)3u1	3	3	5	5	54
y2w e(y)1u1e(y)3u1					0
y2w e(y)1u1e(y)3u1;P{e(y)1+}-1-5/+	3	4	5	5	42–51
y2w e(y)1u1e(y)3u1;P{Δe(y)1}-1/+	1	1	1	2	7
y2w e(y)1u1e(y)3u1;P{Δe(y)1}-2/+	0	1	2	2	15
y2w e(y)1u1e(y)3u1;P{Δe(y)1}-3/+	1	2	2	3	11
y2w e(y)1u1e(y)3u1;P{Δe(y)1}-4/+	1	2	2	3	11
y2w e(y)1u1e(y)3u1;P{Δe(y)1}-2/P{Δe(y)1}-3	2	2	4	5	17

^aAbbreviations: P{e(y)1⁺}-1-5 or P{Δe(y)1}-1-5, different single insertions of P{w⁺, e(y)1⁺} or P{w⁺, Δe(y)1} in five strains; P{Δe(y)1}-2, single insertion in the second chromosome; P{Δe(y)1}-3, single insertion in the third chromosome; Th, thoracal bristles; L, leg bristles; W, wing bristles; Ab, abdominal bristles. 

^bLevel of pigmentation in 3- to 5-day-old males developing at 25°C, ranked on a scale of 0 (pigmentation of y¹ flies) to 5 (pigmentation of y⁺ flies). Flies with well-characterized y alleles were used to define the control level of pigmentation (4, 5). The effects of constructions with the e(y)1 gene on the y² e(y)1^u1, y² e(y)3^u1, and y² e(y)1^u1 e(y)3^u1 mutation combinations was studied in the crosses of y² e(y)1^u1/FM4, y² e(y)3^u1/FM4, and y² e(y)1^u1e(y)3^u1/FM4 females with y²w e(y)1^u1;P{Δe(y)1}/P{Δe(y)1} and y²w e(y)1^u1;P{e(y)1⁺}/P{e(y)1⁺} males. FM4 is an abbreviation for FM4,y^31dsc⁸B, the balancer for the X chromosome. 

^cPercentage of surviving males with a given phenotype, calculated as a ratio between given males and FM4 males. ND, not determined.