QuestenaPractice that shows what to review next
SearchCreate a test
Question 102

A population contains an allele that has never been present in it before. Which process produced that allele?

  1. Selective breeding by people
  2. Natural selection acting on the population
  3. Mutation of an existing alleleCorrect answer
  4. A change in the climate the population lives in

Explanation

A new allele is a new version of a gene, and a version that did not exist before can only come from a change to the DNA sequence itself. Selection and changing conditions decide which of the versions already present become common, but neither of them writes a new version.

Continue with this test

Start practice
Understand this topic (≈6 min)Back to test
Question 102: A population contains an allele that has never been present… · Genetics Basics · Questena