| http://www.w3.org/ns/prov#value | - Some genetic diseases such as sickle cell anemia may allow differential survival of its victims in malarial zones???a phenomenon called a balanced polymorphism (genetic variation, e.g., blood types).4 This results in a deleterious gene (sickle cell) being maintained at a relatively high frequency in a population, even though it can be lethal in a double dose (homozygous), because it protects its c
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