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Q.9 Describe the effects of gene mutations on organisms
8M7
The following passage describes the effects of a gene mutation, which is a permanent change in a gene. Read the passage and then follow the instructions below.

common carp with large, patchy scales (top), and small, evenly spaced scales
Common carp are a type of fish that have scales on their bodies. The pattern of scales on a common carp is established while the fish is developing inside its egg. During this time, a protein called Fgfr1a1 sends signals to the fish's body that direct the shape and spacing of the fish's scales. The signals from the Fgfr1a1 protein result in common carp with small, evenly spaced scales.
The Fgfr1a1 protein is encoded by the fgfr1a1 gene.
A certain carp had large, patchy scales because of a mutation in the fgfr1a1 gene. Compared to the fgfr1a1 gene without a mutation, the mutated fgfr1a1 gene encoded a form of the Fgfr1a1 protein with a different structure.
This different form of the Fgfr1a1 protein could not send signals to the fish's body.
Complete the sentence.