A homeotic gene does which of the following? a. It serves as the ultimate control for prokaryotic operons. b. It regulates the expression of groups of other genes during development. c. It represses the histone proteins in eukaryotic chromosomes. d. It helps splice mRNA after transcription.

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1. Identify the primary function of homeotic genes. Homeotic genes are known for their role in regulating the development of anatomical structures in various organisms.
2. Analyze each option in relation to the function of homeotic genes. Consider how each option aligns with the known roles of homeotic genes in controlling developmental processes.
3. Option a discusses control in prokaryotic operons, which is not related to the role of homeotic genes in development.
4. Option c talks about repression of histone proteins, which is more related to chromatin structure and gene expression regulation, not specifically the role of homeotic genes.
5. Option d mentions splicing of mRNA, which is a process involved in post-transcriptional modification and not directly linked to the developmental control functions of homeotic genes.