Theridion grallator, a small (100 days after hatching. Time required for completion of pattern development was roughly proportional to the amount of red in the final pattern. Mature males and females had similar morph frequencies overall, yet three rare morphs were seen only in females. Phenotypic frequencies of families were consistent with Mendelian inheritance at one locus, with the allele dictating absence of pattern recessive to alleles for patterned morphs.
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