Insertion of DNA into the regulatory region of y.
7kb insertion 5' to the start of transcription, within the 489bp HindIII/BalI fragment.
Body colour: bristles, hairs, wild-type.
Body colour: type 2 allele - some areas of cuticle are wild type, others have mutant pigmentation.
Body colour: body rich tan, antennae light yellow, bristles black. Larval mouth part colour: golden brown.
ytd has phenotype, non-enhanceable by mod(mdg4)ul
Spencer, Dec. 1936.