Lap Report- BIOL 111G Genetic Drift & Natural Selection

Lap Report- BIOL 111G Genetic Drift & Natural Selection...

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Luis Fernandez BIOL 111G Lab Section M13 October 17,2016 Lab Report: Genetic Drift & Natural Selection Results In this experiment, a simulation of Genetic drift was conducted to investigate the differences of the effect of genetic drift on large and small populations. The results from the genetic drift simulation are shown in Table 1. Noticeably, there was a decrease in the population size of dark moths. Bottleneck effect caused a downward slope which can be seen Figure 1. The graph shows the population of black moths reaching a fixed position of zero indicating that the black moths were extinguished. Two small groups such as the light and dark moths can produce new populations that differ from the original group which is a 50/50 ratio of light to dark moths. The relative frequencies of alleles will more likely be stable from one generation after another when a population is large. In small populations, individuals that carry a particular allele may leave more offspring than other individuals. This can cause an allele to become more common in a population. Table 1. Class results from the Genetic Drift simulation Generation Group 1 Group 2 Group 3 Group 4 Group 5 Group 6 1 50 50 50 50 50 50 2 42 48 60 44 46 32 3 36 40 78 59 50 18 4 26 18 82 48 46 8 5 20 20 80 40 20 0 6 0 0 100 20 40 0 7 0 0 100 0 40 0
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