Your answer would be "nervous-mesoderm".
Answer:
The less important allele.. ish. The allele will only "work" (Show up) if there is two recessive allele. And Ressesive allele is always lower case. So rr will show up but Rr wont because there is a dominant allele. Hope this help. :)
Explanation:
Blue Eye is recessive allele
Brown eye is dominant allele
