Multiple choice

The true breeding organisms are ______________.

  1. homozygous

  2. heterozygous

  3. nullizygous

  4. hemizygous

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

A cell is said to be homozygous for a particular gene when identical alleles of the gene are present on both homologous chromosomes. The cell or organism in question is called a homozygote. True breeding organisms are always homozygous for the traits that are to be held constant.