Answer:
1/2
Step-by-step explanation:
Ggrr gives Gr, Gr, gr, gr
ggRR gives gR only.
So, the combination would be GrRr, GrRr, ggRr, ggRr
To have both dominant traits, the child has to GG or Gr, and RR or Rr
2/4=1/2
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