- Table 1 Frequencies Of Genotypes From An Unchanging Parental Population Genotype Class Percent Hw Prediction 27 25 G 1 (346.16 KiB) Viewed 85 times
Table 1 - Frequencies of Genotypes from an Unchanging Parental Population Genotype Class percent HW prediction 27% 25% GG Gg gg 52% 21% 3) Did Hardy-Weinburg work? Explain, referring to the data. Yes the HW equation did work, since the class percentages were pretty close to the HW prediction. The class percent values also added up to equal 100%, which is 1, and for the HW equation to work correctly, the end value must equal 1. 4) Why did you make 100 offspring instead of, say, 10 or 15? The number 100 will make the answer/ prediction of the alleles more accurate. It is easier to calculate the percentages when using 100 as well, since the population is larger, and in the HW equation, the final answer is equal to 1, which is 100% in percentages. Smaller populations display larger amounts of genetic drift. In small populations genetic drift is seen quicker. GG 25% Gg 50% gg 25% G g Table 2 - Frequencies of Genotypes with Genetic Drift 1st generation 2nd generation Predicted 50% 50% 50% 25% Actual 40%(2/5) 36% 40%(2/5) 48% 20%(1/5) 16% 60% 40% Predicted Actual 20% 80% 0% 4th generation 3rd generation Predicted Actual Predicted 80% 20% 0% 36% 48% 20% 60% 40% 90% 10% Actual 81% 18% 1% 5) Explain the pattern that you saw between G and g from one generation to the next. The predicted genotypes are different compared to the actual genotypes. The predicted patterns for the first generation were more equal to each other compared to the actual percentages which made the dominant allele G bigger and the recessive allele_g smaller. 6) Is this expected or not? Explain, referring to genetic drift and founder effect. Yes this is expected, especially because the yellow beads are being taken out of the jar, and representing the recessive gene "dying" out. This increases the dominant allele to have increased chances of being drawn. 7) If you continued for another generation; what might a prediction be for the ratio of G to g?
TABLE 3 - CHANGES IN FREQUENCY FOR 100% NEGATIVE SELECTION Genotypes GG Gg gg(deadly gene) G First 27% 52% 21% 50% 50% Second 42% 47% 11% 100/158% -63% 58/158=37% Third 54% 37% 9% 100/136%=74% 100/118=85% 18/118=15% 36/136%=26% Fourth 8) Is the percentage reduction of green individuals in each generation the same? Explain this pattern. 9) How many generations would it take to eliminate the g allele? Explain your reasoning. 10) If natural selection eliminated the dominant allele instead of the recessive allele, who would die out now? How would this affect the gene pool of the population? 11) What would the results have showed if instead of being 100% lethal, genotype gg was lethal only 30% of the time?