Final answer:
Gene inversion, siRNA and transcript, Methylation of CpG islands, Limited availability of initiation factors, Transcriptional repressors, Cleaving of 3' end
Step-by-step explanation:
Gene inversion does not cause a loss of genetic info but may affect regulation of the inverted genes. A siRNA and the transcript it targets are transcribed from the same gene. Methylation of CpG islands represses promoter activity. Limited availability of initiation factors prevents translation of mRNA. Transcriptional repressors compete with activators for DNA binding sites. The 3' end can be cleaved to produce different transcript lengths before addition of the poly-A tail.
Learn more about Mechanisms of gene regulation