The novel had rocks discovered on some planet that were sentient. Humans used them for cell phones. They wanted to be free and enlisted some sort of geneticist sometimes called "a bodybuilder" to help them. Along the way, humans are found to be de-evolving. The novel kept using the line "ontogeny recapitulates phylogeny". The geneticist was turned into a woman at one point and sexually assaulted by a sheikh. He also met the pope. In the end, all the humans became the rocks.
"Phylum Monsters" by Hayford Peirce.
The Kliatt Young Adult Paperback Book Guide's review mentions:
people communicating via sentient, telepathic Martian rocks
Robert Claybom, life-stylist
29,354 men created from his most popular custom design starting to regress to apes
Martian Oneness, the overmind of the rocks wanting Robert to liberate the animas of the individual rocks by finding organic bodies for them.