Gene Expression in Developing Organisms Is Regulated on Several Different

Gene expression in developing organisms is regulated on several different levels. In many developing animals, regulation of gene expression is influenced by the action of Hox genes. Which of the following regulatory elements are produced by many Hox genes?

A) transcriptional factors
B) signals from maternal cytoplasm, such as bicoid
C) mRNA processing factors
D) cell surface molecules for cell- cell interactions

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