Why Evolution is Important and the Mechanisms of Evolution | 10/8/18-10/12/18

Evolucija konja.jpg
Evolucija skeleta konja by Llez

Summary:

       Evolution is any change in the heritable traits within a population across generations. Evolution in simpler terms is the slow descent (or increase) with modification. It is changes in the genetic pool over time. Their are five mechanisms/driving forces of evolution. Those mechanisms, driving forces are genetic drift, mating with specific traits, mutations, gene flow, and natural selection.  Natural selection is a change in DNA (these changes are random) that is passed on into the next generation's gene pool. Genetic drift is the slow change of specific genes in a population. Two things that cause by the founder effect and bottlenecking. The founder effect is when a small sample from a population with a specific trait (or set of traits) moves to a different location (separate from the rest of the population) and only procreates within itself. Gene flow is the movement of genes from one population to another.

S&EP 2-Developing and Using Models:

       I built a model this week in science when conducting an experiment. This model allowed me to organize data to make it easier to analyze. The model consisted of 12 columns and 9 rows . This model allowed me to truly see how my experiment went. It also made it very easy to input data as well. This model was heavily based off of numbers and using this model made it very easy to calculate the numbers to actually input in the table.

XCC-Cause and Effect:

      The cause and effect relationship I identified this week has to do with greater prairie chickens. I identified this relationship from the article titled, "Genetic Drift: Definition, Examples, and Types" by Study.Com when researching genetic drift. In the article it says, "...The number of greater prairie chicken,  a bird found in the prairies of Illinois, was drastically reduced during the 19th and 20th centuries due to hunting and habitat destruction.  The number of birds went from millions to fewer than 50, and as a result, more than 30% of the alleles were lost forever." The cause of this relationship is hunting and habitat destruction. The effect of this relationship is a drastic change in the population of this species, and 30% of the alleles being lost forever.

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