**Category:** Genetics  
**Subtype:** Genetic Crosses / Punnett Squares  
**Problem Description:** Determine the maximum number of purebred lines that can be produced from the pollen of a plant with the genotype AaBbDd.  

**Summary:** The problem asks how many different purebred lines can be generated from a plant with three gene pairs (A, B, and D), each with two alleles (A/a, B/b, D/d).