Multiple choice

A balanced polymorphism occurs when

  1. there is selection against the homozygous recessive individuals

  2. there is selection against heterozygotes

  3. there is selection against all genotypes

  4. there is selection against all homozygotes

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

A balanced polymorphism occurs when homozygotes are selected relative to heterozygotes.