1. When the offspring inherit one affected recessive allele (S) and one normal allele (A), they become unaffected carriers (AS) and are said to have _____________. 2. The mutation that causes sickle...

1. When the offspring inherit one affected recessive allele (S) and one normal allele (A), they become unaffected carriers (AS) and are said to have _____________.

2. The mutation that causes sickle cell disease is more common among persons whose ancestry is connected to the following geographic regions: _____________, _____________, _____________, _____________, _____________, _____________, and _____________.