. According to our book by W. W. Norton & Company, the four forces of evolution are mutation, gene flow, genetic drift, and natural selection. Mutations occur at the genome level, involve a permanent alteration in gene or chromosome, and results in a unexpected change from parents to offspring. Gene flow, which can also be called gene migration, occurs when genetic properties pass from one population to another. For example, when two races mix and traits begin to appear among one race of people that were not before apparent. Genetic drift is when genes alter over a time span simply by chance. Natural selection is when differences in phenotypes are very important to a species survival. Darwin studied finches, for example, and which characteristics mattered the most in order to survive such as the best-shaped beak.
B. According to encyclopedia.com, “Balanced polymorphism is a situation in which two different versions of a gene are maintained in a population of organisms because individuals carrying both versions are better able to survive than those who have two …show more content…
A frame shift mutation is when there is an addition or subtraction in the DNA gene series causing more of the strain to be affected or influenced. A point mutation is when one point of the DNA strand is directly affected meaning that there is less of an overall affect on the whole DNA strand.
D. The founders effect can lead to a descendant population in a relatively short period of time due to the size of the population group being relatively small. The smaller the population group, the less room there is for genetic variation. This means that the population’s offspring has the opportunity to result in many of the same features being passed down. At the same time, this can also result in some of the features being lost and not passed down at all due to the small number of genetic variation in the population. This same effect will occur as long as the population remains in the same small
B. According to encyclopedia.com, “Balanced polymorphism is a situation in which two different versions of a gene are maintained in a population of organisms because individuals carrying both versions are better able to survive than those who have two …show more content…
A frame shift mutation is when there is an addition or subtraction in the DNA gene series causing more of the strain to be affected or influenced. A point mutation is when one point of the DNA strand is directly affected meaning that there is less of an overall affect on the whole DNA strand.
D. The founders effect can lead to a descendant population in a relatively short period of time due to the size of the population group being relatively small. The smaller the population group, the less room there is for genetic variation. This means that the population’s offspring has the opportunity to result in many of the same features being passed down. At the same time, this can also result in some of the features being lost and not passed down at all due to the small number of genetic variation in the population. This same effect will occur as long as the population remains in the same small