In Germany a huge tornado wipes out about half of the trees

In Germany, a huge tornado wipes out about half of the trees in a particular population. The trees that died did so by chance. Now, only half of the original population can contribute their genes to the next generation. Example 2: In England, the same tornado also kills many trees, but especially the ones that do not have very deep roots because they are pulled out of the earth more easily. What evolutionary \"force\" is acting in Example 1? What evolutionary \"force\" is acting in Example 2? What are the genotypes for each of the phenotypes of the ABO blood system?

Solution

1. Genetic drift

Because the removal of that tree was random so this indicating that the process is genetic drift where change in the frequency of a gene variant (allele) in a population due to random sampling of organisms that selection may be beneficial or harmful.

2. Natural Selection

Because the long root of the plant is a positive selection means beneficial trait so this process can be defined by Natural selection. In Natural selection the genetic (heritable) basis of any phenotype that gives a reproductive advantage may become more common in a population.