Hox Genes & Animal Body Plans
Animals have very different body plans. Compare, for example, a centipede to a bird, or a mouse to a fly, and it’s easy to see the differences. How has evolution produced such diversity? One of the most amazing discoveries in the last couple of decades has been the demonstration that the same sets of genes control the development of animal form. These genes, called Hox genes, act like genetic switches to turn on and off other genes. The last common ancestor of all animals had a similar set of Hox genes to living animals; over time some have evolved new functions, others do the same thing in all animals.
Hox Genes & Animal Body Plans Animals have very different body plans. Compare, for example, a centipede to a bird, or a mouse to a fly, and it’s easy to see the differences. How has evolution produced such diversity? One of the most amazing discoveries in the last couple of decades has been the demonstration that the same sets of genes control the development of animal form. These genes, called Hox genes, act like genetic switches to turn on and off other genes. The last common ancestor of all animals had a similar set of Hox genes to living animals; over time some have evolved new functions, others do the same thing in all animals.
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