Give a brief answer for
Define test cross.

Explanation

### Step-by-Step Text Solution

1. **Definition of Test Cross**: A test cross is a genetic cross performed to determine the genotype of an individual that exhibits a dominant phenotype. This is done by crossing the individual with a homozygous recessive individual.

2. **Purpose of Test Cross**: The main purpose of a test cross is to identify whether the dominant individual is homozygous (having two identical alleles for a trait) or heterozygous (having one dominant and one recessive allele).

3. **Example of Test Cross**:
- If we take a dominant phenotype individual (let's say a tall plant) and cross it with a homozygous recessive individual (a dwarf plant), we can analyze the offspring.
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