How do non-native species affect the populations within the ecosystem where they are introduced?

Invasive species cause harm to wildlife in many ways. When a new and aggressive species is introduced into an ecosystem, it may not have any natural predators or controls. ... Invasive species can change the food web in an ecosystem by destroying or replacing native food sources.

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.

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