It should be 50/50 if the male would be Rr for heterogenous male red and the female rr for homogenous for white.
Falling pressure indicates the mass of the atmosphere above a point is decreasing, which can happen as the result of various atmospheric processes. In general, weather systems with low pressure at their centers (called cyclones) are associated with unsettled weather (clouds and precipitation) and strong winds. So, I’m guess cold and wet air mass.
Aren't those cattails? If not, I'm not sure what they are.
Hopefully I have helped.
