People with an aa genotype will express a recessive trait
Explanation:
Of all the continents, Europe and Asia are the most densely populated. Asia alone contains more than 60 percent of the world's people. Which continents are most densely populated? Today, most people in Europe, North America, South America, and Australia live in or around urban areas.
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<em>A cliff is a steep and often sheer rock face. If you stand on the edge of a cliff and peer over, you'll be able to see the waves crashing on the rocks below.</em>
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Most people live near the Ganges River system, as the river provides water for irrigation for farming and is a major religious landmark.
The answer is A. in the Ganges River system.