In What Type of Environment Is Being Heterozygous in Regards

question 25

Multiple Choice

In what type of environment is being heterozygous in regards to the sickle-cell trait an advantage?

• A) an environment that has malaria
• B) an environment that is malaria-free
• C) an environment that is exposed to a large amount of sunlight year-round
• D) an environment that is degraded
• E) an environment that is cold and rainy Being heterozygous in an environment that has malaria is advantageous. The heterozygote produces red blood cells that secrete potassium, which causes the malaria parasite to die.

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