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What Did Cohn and Tickle's Research Suggest About Snake Evolution

Question 52

Multiple Choice

What did Cohn and Tickle's research suggest about snake evolution?

A) The second stage in snake evolution, the reduction or complete absence of forelimbs, is caused by other genetic variations that appeared some time after the altered expression pattern of Hoxc6.
B) The second stage in snake evolution, the reduction or complete absence of forelimbs, is caused by other genetic variations that appeared some time after the altered expression pattern of Hoxc8.
C) The second stage in snake evolution, the reduction or complete absence of hindlimbs, is caused by other genetic variations that appeared some time after the altered expression pattern of Hoxc6.
D) The second stage in snake evolution, the reduction or complete absence of hindlimbs, is caused by other genetic variations that appeared some time after the altered expression pattern of Hoxc8.

Correct Answer: