Homeotic Genes Contain a Homeobox Sequence That Is Highly Conserved

Homeotic genes contain a homeobox sequence that is highly conserved among diverse species. The homeobox sequence encodes a protein domain that binds DNA and regulates development. Which of the following statements is correct regarding homeotic genes?

A) Homeotic genes are selectively expressed as an organism develops.
B) Homeoboxes cannot be expressed in invertebrate species.
C) Homeotic genes in apes and humans are very different.
D) Homeobox sequences have shown convergent evolution among species.

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