Enhances the variegation in, i.e. reduces the eye pigmentation of, In(1)wm4h, Su(var)2-11 males.
mod(mdg4)142Δ32/mod(mdg4)[+] is a suppressor of suppressor of variegation phenotype of In(1)wm4h, Su(var)2-11
In(1)wm4h, Su(var)2-11, mod(mdg4)142Δ32/mod(mdg4)[+] has pigment cell phenotype
The lethal phenotype of mod(mdg4)142Δ32 is fully complemented by mod(mdg4)Z3-3401, but mod(mdg4)142Δ32 fails to complement mod(mdg4)Z3-3401 with respect to X-Y chromosome nondisjunction in male meiosis - transheterozygotes show a high level of X-Y nondisjunction (28.3%).
The lethal phenotype of mod(mdg4)142Δ32 is fully complemented by mod(mdg4)Z3-5578 and mod(mdg4)Z3-3298, and mod(mdg4)142Δ32 partially or fully complements these alleles with respect to X-Y chromosome nondisjunction in male meiosis - the transheterozygotes show only a low level of X-Y nondisjunction (frequency is indicated in parentheses after each allele); mod(mdg4)Z3-5578 (0.95%) and mod(mdg4)Z3-3298 (1.46%).
Alleles of mod(mdg4) show an allelic series for their effect on In(1)wm4h variegation. From strongest to weakest: mod(mdg4)R32 = mod(mdg4)04 = mod(mdg4)06 = mod(mdg4)07 = mod(mdg4)142Δ32 > mod(mdg4)neo129 = mod(mdg4)02 = mod(mdg4)03 > mod(mdg4)05.