Chromosomal polymorphism in Drosophila birchii.
D000818:Animals; D005075:Biological Evolution; D002869:Chromosome Aberrations; D002875:Chromosomes; D004330:Drosophila; D005260:Female; D008297:Male; D011110:Polymorphism, Genetic; D012469:Salivary Glands / Q000166:cytology