Royal Rebel by Gail Gernat

In the distant future, where even minor infractions are punished by permanent slavery, a corrupt class of royalty oppress the people and control planets with brutal persecution. A young woman fights in secret for all people and aliens. Radhya is a genetic prodigy, able to manipulate DNA like no one else, but only she can see the dread future waiting for royal, commoner and slave alike. But can she divert it?