A cell contains four pairs of homologous chromosomes represented by A1/A2 B1/B2 C1/C2 D1/D2. Which of the following represents the chromosome makeup of a gamete derived from this cell?
A. A1A2B1B2 C1C2D1D2
B. B1B1C1D1
C. A1A2B1B2
D. A1B2C2D2
E. A1C1C2D1
Answer: D. A1B2C2D2