Assuming a "standard" 3-tier application (UI - Domain - Data), should the `Domain Layer` show to the UI classes originally defined in the `Data Layer`?

I mean, assuming there's a `Product` class defined in the `Data Layer`, is it wrong to make some method from my `Domain Layer` have methods returning it (this is, making them visible to the UI)? Or should I define in the `Domain Layer` itself some class that wraps the `Product` from the `Data Layer`, so the UI now doesn't depend on the `Data Layer`?

Thanks