When crossing aquarium fish barbs with a simple and golden color, offspring appeared, all individuals of which had a simple color

When crossing aquarium fish barbs with a simple and golden color, offspring appeared, all individuals of which had a simple color. Identify the dominant and recessive traits, genotypes of parents and first-generation hybrids. What signs will the descendants of the second generation have when obtained by crossing hybrids of the first generation?

Simple coloring; AA (dominant)
Golden color: aa (recessive)
Genotype of the first generation: Aa
Genotype of the second generation: AA, Aa, aa. There will be descendants with simple coloring and golden.

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