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Suppose gene A is orthologous in species 1 and species 2 and gene B is paralogous to gene A in species 1. Gene A differs considerably between species, yet gene A and gene B show little divergence from each other. Suggest a sequence of two evolutionary events that could cause this outcome.

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Answer:

The orthologous and paralogous determines the species divergence among the related or different species. Orthologous gene transfer after the speciation event whereas paralogous gene transfer after the duplication event.

As the information given in the question, it can be concluded that both the species A and B has been diverged from each other. The gene B is produced from the gene A in the species 1. This diversion might occurs before the event of the gene duplication.

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