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

question 48

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.

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