In French Bulldogs, what gene is responsible for causing the rare "Fluffy" coat?

Answer

The Fibroblast growth factor gene.

The rare 'Fluffy' coat appearance in French Bulldogs, characterized by a longer, fluffier coat, is attributed to the presence of the Fibroblast growth factor gene.

In French Bulldogs, what gene is responsible for causing the rare "Fluffy" coat?
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