Achange in the frequency of any mutant allele in a population most likely depends on the

The answer is ‘the degree of dominance of the selected allele with respect to fitness’. If natural selection favors the mutation, the allelic frequency will increase in the population. However, if the mutation is disadvantageous to the individuals with it, the allelic frequency will decrease and probably become lost.  

answer; /// i believe the name your looking for is called (plaque)or check good luck

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.