A male rabbit with genotype GgBb with a female rabbit with genotype ggbb show the punnets square and the expected offspring and their proportions

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Explanation:

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In 1942, Great Britain was at the head of the British Empire, the largest Empire in  known history.

At it's peak, the empire consisted of nearly 25% of the world's population, a large landmass, unmatched resources and hundreds of millions of subjects.

If the axis were able to control Great Britain, they would quite possibly have complete hegemony over the world.