AGB 121: Principles of Animal Genetics and Population Genetics (2+1)

Nature of wing in drosophila

2. NATURE OF WING IN DROSOPHILA

• In the wild strain of Drosophila, the wings are normally long (vg⁺).
• The two mutant alleles in this locus are vg^v (vestigial) and vg^a (antlered).

• The mutant alleles are recessive to the normal gene.
• But when the vestigial wing and antlered flies are crossed the F1 hybrids are intermediate in appearance and this phenotype is often called vestigial-antlered.
• This suggest that vg^v and vg^a are neither dominant nor recessive to each other but only intermediate in effect.
• In addition to these alleles the vestigial locus carries other mutants such as strap (vg^st), nicked (vgⁿⁱ) and notched (vg^no) etc.