The presence of a dominant-recessive relationship among a pair of alleles can be demonstrated by the probabilities of different traits in offspring. For example, consider a purple-color allele, P, in a plant crossed with a plant having white flower color, W. The resulting offspring can have any of three possible allele combinations: PP, PW, and WW.
Predictions and warnings can also reduce damage and economic losses. When notice of an impending disaster can be issued well in advance, as it can for some riverine floods, wildfires, and hurricanes, property and natural resources can be protected.
