11994
Anal fins were used for qualitative gene expression analysis of the genes sonic hedgehog ( shh ) , muscle segment homeobox C ( msxC ) , and fibroblast growth factor receptor 1 ( fgfr1 ) by in situ hybridization .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None