Shh Signaling Is Essential for Normal Patterning of the Digits

question 10

Multiple Choice

Shh signaling is essential for normal patterning of the digits.When Shh signaling is genetically inactivated in mice,which digit forms?

• A) Digit 1, the most anterior (cranial) digit
• B) Digit 2
• C) Digit 3
• D) Digit 4
• E) Digit 5, the most posterior (caudal) digit

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