Within the Evolutionary History of Animals There Have Been Multiple

question 139

Multiple Choice

Within the evolutionary history of animals there have been multiple duplications of the regulatory homeotic genes found in the hypothetical animal ancestor. How does this relate to the evolution of millions of complex multicellular animals?

• A)Each copy of the regulatory genes can evolve to alter patterns of development in the animal, resulting in many different morphologies in the organism.
• B)Each copy of the regulatory gene can evolve independently, but different copies of the genes are lost so only one of each type remains in different lineages. This results in different animal morphologies.
• C)Each copy of the regulatory gene is specific to one lineage, and results in different animal morphologies.

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