Differentiate between homozygous and heterozygous organisms.

Explanation

To differentiate between homozygous and heterozygous organisms, we can follow these steps:

### Step 1: Define Homozygous
A homozygous organism has two identical alleles for a particular gene. This means that both alleles are either dominant (e.g., AA) or recessive (e.g., aa).

### Step 2: Define Heterozygous
A heterozygous organism has two different alleles for a particular gene. This means that one allele is dominant and the other is recessive (e.g., Aa).

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