Differentiate between back cross and test cross.

Explanation

### Step-by-Step Solution

1. **Definition of Back Cross**:
- A back cross is a breeding experiment where the F1 generation (first filial generation) is crossed with one of its parental genotypes. This helps to determine the genotype of the F1 offspring by observing the phenotypes of the resulting offspring.

2. **Example of Back Cross**:
- Consider two plants: one homozygous tall (TT) and one homozygous dwarf (tt). When the F1 generation (Tt) is crossed back with either of the parents (TT or tt), it is termed a back cross.
- If crossed with TT, all offspring will be tall (100% tall). If crossed with tt, the offspring will be 50% tall and 50% dwarf.
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