Well I doubt it appeared out of thin air.
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This did not occur.
If it did occur it would still be illogical to think the Jews picked up SSA. Coptic Egyptians are only 6-7% SSA on average and that is today, after significant geneflow from Nubia and beyond for 4,000 years. Archaeogenetic studies prove ancient Egyptians were even less SSA, on average. Modern Ashkenazim are 2-3% SSA and Sephardim are 3-4%. The likelihood is ancient Egyptians were barely more SSA than this. For the Egyptians to have turned the Jews from 0% SSA to 5-6% SSA (since halved by European admixture) the ancient Israelites would have had to have been about 85% Egyptian.
But like I say, it's nonsense.
I am J2b2 sub J-YP91, pure conqueror lineage
https://i.imgur.com/XCaXsu2.png
https://i.imgur.com/890eZfZ.jpg
Was, was. Even your atheistic cogoy, David Rohl, proved this beyond any doubt. Listen to his lecture about Exodus and New Chronology of pharaos, which even in old chronology fits perfectly to the verbal meaning of the duration of being in Egypt, which he missed, being focused on new dating of evrything.