Evolution
Allele frequency is the amount of a trait this it expressed in a population. Allele frequency can change due to four different causes, mutation, migration, genetic drift, and natural selection. An allele frequency can change by mutation because a new trait can be added or taken away. For example sometimes frogs are born with a fifth leg. This mutation can either helpful or hurtful toward the animal. Migration is when a group of individuals move from one population to another. An example of this is when a new fish is brought to a pond filled with other fish. As it begins to mate with fish not part of its old population a new population is created. This creates new alleles. Genetic drift is a random change in allele frequency. There are two forms of this. The founder affect when an insect with a certain allele moves to a new area. The alleles can either increase or decrease. Population bottleneck disaster is when a natural disaster causes a population of allele to leave. Only one allele survives. Finally natural selection can reduce the amount of alleles in a population. Natural selection is survival of the fittest, those who can adapt to the environment to survive pass on the allele that helps the other generation survive. The three types of natural selection are stabilizing, disruptive, and directional. Stabalizing means the environment supports the medium trait. Disruptive selection is when the environment supports the extremes of the population, directional selection is when the environment supports only one extreme in the population. There are different ways to study evidence of evolution. For example, fossils, geography, comparative anatomy, and molecular biology. Fossils show how current organisms changed from their ancestors. Geography can show fossils of similar organisms in different environments. Comparatve anatomy can show similar structures in organism and even vestigial organs. Fianly Molecular biology allows us to compare the DNA of different organisms to show similarities and differences. Some special adaptations my animal has developed in their enviroment is head fins, soft body/ gelatiotns, and no raduid (which is a tough toothy tounge). There is no evidence of earlier forms of my organism but they came from octopods that did leave fossils behind which is very rare.