South Africa-born Jennings -- whose father, Ray, coached the South African national team -- will replace Haseeb Hameed, who has a broken left little finger and Dawson fills in for fellow left-arm spinner Zafar Ansari, who is struggling with a back problem, according to the England and Wales Cricket Board.
Hameed is returning home for an operation on the back of plaudits for his courageous half century in the second innings of the Third Test in Mohali on Tuesday which England lost to go 2-0 down in the five match series.
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Durham star Jennings -- who averaged over 60 for Durham in the County Championship last season -- is set to be captain Alastair Cook's 11th opening partner since former skipper Andrew Strauss called it a day four years ago.
Jennings, 24, should get an immediate run-out for England Lions against the United Arab Emirates on Thursday before heading to India for the fourth Test in Mumbai next week.
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Ansari is also due to return to England while 26-year-old Dawson, who made his ODI and T20I cricket debut this summer, is expected to arrive in India next week from Bangladesh where he is playing in the Premier League for Rangpur Raiders.
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