rRNA gene copy number, about 20.
lethal
lethal | recessive
abdominal tergite
macrochaeta
bbl/bb1 is extreme bb, very late hatching, and invariably classifiable. bbl/bbl/Y = bbl/Y = normal. bbl/0 is lethal. RK2A.
Bridges, 1926.
Segregation from Y chromosome normal. Crossing over reduced in right end of X in bbl/+ females.
Complements: stnA16-1-49. Complements: intro16-3-4. Complements: intro17-410. Complements: l(1)19Ec17-344. Complements: intro16-2-9. Complements: sph16-2-9.
Molecular analysis of the bbl chromosome reveals that no rRNA genes are present on the chromosome.
Segregation from Y chromosome normal. Crossing over reduced in right end of X in bbl/+ females.
Complements: stnA16-1-49. Complements: intro16-3-4. Complements: intro17-410. Complements: l(1)19Ec17-344. Complements: intro16-2-9. Complements: sph16-2-9.
Molecular analysis of the bbl chromosome reveals that no rRNA genes are present on the chromosome.