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Investigating Diversity (Calculating Standard Deviation (s = √(Σ (x -…
Investigating Diversity
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Gene Technologies
Early estimates of genetic diversity were made by looking at the frequency of measurable or observable characteristics in a population.
Different alleles of the same gene will have slightly different DNA base sequences. Comparing DNA base sequences of the same gene in different organisms in a population allows scientists to find out how many alleles of that population there are.
These new technologies can be used to give more accurate estimates of genetic diversity within a population than can be made just by looking at the frequencies of characteristics.
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Investigating Variation
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Individuals of the same species have the same genes, but different alleles. Individuals of different species have different genes altogether.
When studying the variation in a population you usually look at a sample of the population, and not the whole population.
Random sampling can be used to make sure that investigating variation of a whole population is not biased. Random coordinates should be generated and a square should be placed on those coordinates. The number of different organisms should be counted.
Standard deviation tells you how much the values in a single sample vary. For example, 9 with a standard deviation of 3 means that the values all varied around 6 to 12.