The figure shows the number of Hox gene clusters in different groups of animals.

Question

The figure shows the number of Hox gene clusters in different groups of animals. Which of the following is a true statement regarding the number of clusters in each group?

a. All fish > Lancelets > Land vertebrates b. Ray finned fishes > Lancelets > Land vertebrates c. Land vertebrates > All fish > Tunicates d. All fish > Lancelets > Tunicates

Urochordata (tunicates) 1erdata (lancelets) Agnatha jawless fishes) 3 Chondrichthyes (cartilaginous fishes) 4 Teleosts (ray-finned fishes) 7-8 Crossopterygians (coelacanths) Tetrapoda (land vertebrates)

Explanation / Answer

The number of clusters in each group is indicated in the diagram. So, the true statement regarding the number of clusters in each group is option (d) All fish > lancelets> tunicates

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