def enrich_rnas_with_genes(graph):
    """Add the corresponding gene node for each RNA/miRNA node and connect them with a transcription edge.

    :param pybel.BELGraph graph: A BEL graph
    """
    for rna_node in list(graph):
        if rna_node[FUNCTION] not in {MIRNA, RNA} or FUSION in rna_node or VARIANTS in rna_node:
            continue

        gene_node = rna_node.get_gene()
        graph.add_transcription(gene_node, rna_node)