Mutations that have evolved to now be common in humans

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Across
  1. 3. Common mutation affecting mucus production
  2. 6. High levels help digest starchy foods
  3. 7. Mutation causing iron overload
  4. 8. Protection against malaria in carriers
Down
  1. 1. Ability to digest milk as an adult
  2. 2. Reaction common in East Asian populations
  3. 4. Caused by a mutation in the OCA2 gene
  4. 5. Caused by a variant in the MC1R gene