Since I was not allowed to open a topic of this subject, I ask it in this topic and hope that anyone see it.
I wonder if anyone is familiar with what kind of changes of the hox genes that are responsible for a new family, order or class to evolve? Ive heard that changes in the downstream region of hox genes is caracteristic for species within a family. For different families in the same order, for example dogs, cats or bears, Ive heard that it is mutations within the hox genes themselves. What about bigger morphological differences, such as between whales and artiodactyles? What differs there?
If someone also has information on how a gradient of cell growth rate of a particular tissue is affected by different types of mutations in a certain hox gene, I would be grateful. For example: Why the chimps hip-bones are longer than ours due to a hox gene mutation.
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