In certain climates, specific hemoglobin and G6PD alleles have been selected for, as they confer some degree of resistance to malaria in humans.

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This statement is true. In regions where malaria is common, natural selection has favored certain genetic variants that provide some degree of protection against the disease. Specifically, certain hemoglobin and G6PD alleles have been shown to confer resistance to malaria. For example, individuals who inherit two copies of the sickle cell hemoglobin allele are less likely to contract severe forms of malaria than those who do not carry this allele. Similarly, individuals with certain G6PD variants are less susceptible to malaria infection.

In Certain Climates, Specific Hemoglobin and G6PD Alleles Have Been