Without the requirements for evolution by natural selection, the snail population would not have led to the results of them having the change in their snail thickness off time; thicker (best fit) shell thickness. If there is no variation present within the snail population, no shell thickness will be favored or will show a change over time. This is seen in Exercise 2. Exercise 2: No Variation, Starting population shows the beginning population of there only being snails with a shell thickness of 5. No variation reveals to have no change in the population. In Exercise 2: No Variation, Generation 2, there continues to only be snails with a shell thickness of 5. Variation increases survival. This is because, if there is only one type of gene in the population and a predator or other environmental factor tends to take out that gene, the population would be in great danger as to being wiped out due to the lack of diversity and variability. As for if there were variability, the fittest snails with the most favored (resistant to environmental factors) shell thickness would be able to live on and pass down the favored genes to their offspring. As for inheritability, if shell thickness is not inheritable, there is no true predictable outcome. Exercise 2: No Inheritance, Starting Population, reveals to start with snails favoring the shell thickness of 4 and mainly 5, and least favoring 1 and 7.
Without the requirements for evolution by natural selection, the snail population would not have led to the results of them having the change in their snail thickness off time; thicker (best fit) shell thickness. If there is no variation present within the snail population, no shell thickness will be favored or will show a change over time. This is seen in Exercise 2. Exercise 2: No Variation, Starting population shows the beginning population of there only being snails with a shell thickness of 5. No variation reveals to have no change in the population. In Exercise 2: No Variation, Generation 2, there continues to only be snails with a shell thickness of 5. Variation increases survival. This is because, if there is only one type of gene in the population and a predator or other environmental factor tends to take out that gene, the population would be in great danger as to being wiped out due to the lack of diversity and variability. As for if there were variability, the fittest snails with the most favored (resistant to environmental factors) shell thickness would be able to live on and pass down the favored genes to their offspring. As for inheritability, if shell thickness is not inheritable, there is no true predictable outcome. Exercise 2: No Inheritance, Starting Population, reveals to start with snails favoring the shell thickness of 4 and mainly 5, and least favoring 1 and 7.