Multiple choice

The high prevalence of beta thalassemia mutations in Sardinia is best attributed to

  1. high mutation rate

  2. heterozygote advantage

  3. genetic drift

  4. high frequency of consanguinity

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Carriers for a beta thalassemia mutation are relatively resistant to malaria, which confers a heterozygote advantage in this region of the world.