Table 3 . Semiquantitative crossover data for the bb² set of crossover minichromosomes.

	Crossover minichromosome
Marker	m32	m29	m33	m30	m31	m25	m27	m28	m24
R2916	++	+
R2784	++	+
R2166	+++	++	+	+	+	+	+
R2059	+	+	+	++	++	+	+	+	+
R1767	++	+
R1355	+	+
R0963	++	++	+	+	+
R0910	++	++	++	x	x	+
R0750	++	+
S3887	+	+	+	+	+	+	+	+	+
S3542	+	+	+	+	+	+	+
S3518	+	+	+	+	+	+	+	+	+
S3266	+	+
S3079	++	+	+	+	+	+	+	+
S3030	+	+	+	+	+	+	+	+	+
S2876	+	+	+	+	+	+	+	+	+
S2785	+	+	+	+	+	+	+	+	+

The band intensities of the nine R2/1 and eight IGS markers in the minichromosome sets from bb², three Rex-magnified alleles (bb^M1, bb^M3, and bb^M4) and the Ybb⁻-magnified bb^M18 allele were semiquantitatively estimated. The results for bb² are shown here, while the other four sets are in Table S6, Table S7, Table S8, and Table S9. Minichromosomes are listed from left to right on the basis of decreasing number or intensities of the markers. One marker was absent in two lanes in which a new, slightly shorter, band was present (see text). +, marker present. ++, marker distinctly more abundant than +. +++, marker distinctly more abundant than ++. x, marker with apparent molecular weight shift.