Fact 1: Touch is the ability to sense pressure.

Fact 2: Twelve touch genes are needed for touch cell function.

Given the two facts above, answer the question "How many genes are needed for the ability to sense pressure?" with the following options: 
- DNA
 - two
 - UV
 - 12
 - RNA
 - 8
 - Eye
 - p53


 

    12     