Note that the mother cell was heterozygous for both genes A and B (genotype= A/a;B/b), and only a single crossover event occurred on the chromosome where gene A is located. A single pair of chromosomes is drawn in one of the daughter cells. You should now have enough information to choose from the possible pairs of chromosomes shown on the left-hand side and place appropriate chromosomes down on each of the three positions (P1, P2 and P3) marked in yellow. When you place a chromosome onto an allowed position, you will see the box underneath the chromosome turn green and receive a congratulatory popup-box message. If you place a copy of a chromosome onto one of the positions incorrectly, the box will stay yellow and you will be given another chance to place the chromosome onto the correct position. You may restart at any time by reloading the webpage.
Please try to explain why only some arrangements of chromosomes are possible due to the processes of crossing over and independent assortment that happen during meiosis.