A fruit fly has four pairs of chromosomes in its cells. at meiosis, how many different combinations of maternal and paternal chromosomes are possible in the gametes?

Answer: 16 combinations

A fruit fly has four pairs of chromosomes in its cells. Assuming all pair is heterozygotes, each pair of the chromosome can be divided into two possible combinations. So, if there are 4 pairs then the possible combination would be 2 * 2 * 2 * 2 = 16 possible combinations.