Multiple choice

Incompletely penetrant genes are expressed in

  1. phenotypes

  2. genotypes

  3. heterozygous individuals

  4. homozygous individuals

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

The example of an incompletely penetrant genetic inheritance is multiple sclerosis. It apparently develops when an individual who carries the gene or genes for this disease is attacked by a virus that causes a flu-like illness.