Shawna is a carrier of the gene for sickle-cell anemia. although she and her family have lived in america for generations, the gene most likely to protect her ancestors in from dying of malaria.

The answer is Africa. The second largest most populous continent is Africa. Earth’s total surface area 6% and the total land area is 20.4%. 1.2 billion As of 2016. It surrounded the continent by the Mediterranean Sea to the north both the red sea along the Sinai Peninsula to the northeast and Suez Canal, the Indian Ocean to the southeast and the Atlantic Ocean to the west.