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The generation of dorso - ventral polarity during Drosophila embryogenesis is regulated by the action of 12 maternally expressed gene products , the dorsal group .
 GENE: dorsal group
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: dorsal group