Based on (MS-LS4-4) standard(grade8) - Mathematical Representations of Natural Selection: Based on the 'Galapagos Islands Finches - Rainfall Effect' data set(picture attached).This data set shows data about finch populations that was collected at the end of a five year period where there were different amounts of rainfall. How were the finches affected by drought (rainfall less than 25cm/yr) and excess rainfall (rainfall more than 25 cm/yr)? Describe at least two changes observed. What do you think caused the changes in the finch population and average beak size during the periods of excess rainfall and periods of drought? Include appropriate scientific vocabulary when possible. What changes in 'beak-depth' genes within the finch population can be correlated to environmental changes?
Evolutionary Genetics
Evolution is known as continuous changes that occur to adjust organisms in their changing environment over many generations. Various theories have been proposed to illustrate the origin of life and organic evolution. The most accepted one is the theory of natural selection by Charles Darwin. According to his postulate, organisms undergo a struggle for existence due to overproduction. To survive in nature, they acquire variations. The inheritable variations are selected by nature, and it leads to the survival of the fittest.
Phenotype Frequency
The majority of populations have a certain degree of variation in their genetic pools. Scientists can predict the genetic variation happening over time by measuring the amount of genetic variation in a population and these predictions assist them in gaining important insights into the processes that allow organisms to adapt to the environment or to develop into new species over generations. This process is referred to as the process of evolution.
Hardy Weinberg Equilibrium
The frequencies of allele and genotype were maintained constant from one generation to another due to the absence of other evolutionary forces. It is otherwise called the Hardy Weinberg principle the field of population genetics.
Based on (MS-LS4-4) standard(grade8) - Mathematical Representations of Natural Selection:
Based on the 'Galapagos Islands Finches - Rainfall Effect' data set(picture attached).This data set shows data about finch populations that was collected at the end of a five year period where there were different amounts of rainfall.
- How were the finches affected by drought (rainfall less than 25cm/yr) and excess rainfall (rainfall more than 25 cm/yr)? Describe at least two changes observed.
- What do you think caused the changes in the finch population and average beak size during the periods of excess rainfall and periods of drought? Include appropriate scientific vocabulary when possible.
- What changes in 'beak-depth' genes within the finch population can be correlated to environmental changes?
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