Q1. Two species of zooplankton (Daphnia and Bosmina) are both limited by availability of their food (phytoplankton). When grown without Daphnia, Bosmina reaches an equilibrium density of 1000 individuals/liter and drives phytoplankton concentrations down to 30 cells/ml (i.e., at [phytoplankton]>30 cells/ml, Bosmina shows positive growth). In the absence of Bosmina, Daphnia reaches a density of 50 individuals/liter and drives phytoplankton concentrations down to 10 cells/ml. You now grow Daphnia and Bosmina together. Suppose they remain limited by phytoplankton.

Q2. Erminette fowls have mostly light-coloured feathers with an occasional black one, giving a flecked appearance. A cross of two erminettes produced a total of 48 progeny, consisting of 22 erminettes, 14 blacks, and 12 whites. What genetic basis of erminette pattern is suggested? How would you test your hypothesis?