90C;91B1-91B2
90C;91B
bk1 hits fsf << bk2 hits fru
Df(3R)ChaM5/In(3R)fru heterozygotes exhibit a muscle of Lawrence defect. In Df(3R)ChaM5/Df(3R)P14 heterozygotes muscle of Lawrence-position fibres have fewer nuclei than medial fibres.
Heterozygotes with frusat are bisexual.
Males homozygous for In(3R)fru are behavioural sterile and form courtship chains. Males may have no "muscle of Lawrence" (MOL) at all or have an intermediate MOL phenotype: slight thickening or slightly altered insertion sites of the longitudinal muscles. Male heterozygotes with P{w+,fruARO-1}91B1-2 formed courtship chains but were fully fertile and had an abnormal MOL.
Limits of break 1 from polytene analysis (FBrf0049929) Left limit of break 2 from complementation mapping against fru (FBrf0049929) Right limit of break 2 from polytene analysis (citation unavailable)