Why or why not?
5 5. If the lines are not flat, then further change might be expected in future generations. Reset the number of generations to a higher value, if possible. Is there further evolution? Did the A 1 allele become fixed in the population? If not, why do think the A 2 allele is still present in this population?
6 Fr equency of Allele A 1 Fr equency of Allele A 1 Fr equency of Allele A 1 Fr equency of Allele A 1 Activity 3- Selection on recessive and dominant alleles SIMULATION 1 and 2: • Set all parameters to their default values, then set the initial frequency of allele A 1 to 0.01. • Predict what will happen when you try fitnesses of 1, 1, and 0.9, then check your prediction. • Now predict what will happen when you try fitnesses of 1, 0.9 and 0.9, and check your prediction. a) Predictions: 1, 1, 0.9 What actually happened: 1, 1, 0.9 : Generation Generation Predictions: 1, 0.9, 0.9 What actually happened: 1, 0.9, 0.9 Generation Were your predictions correct? Explain:
7 For the last two simulations, when was allele A 1 dominant (with respect to fitness) and when was it recessive? Explain how you know. Which will increase in frequency more rapidly when favored by selection: a rare recessive allele, or a rare dominant allele? Why? (Hint: Try running various combinations of initial frequencies and fitness values in AlleleA1.) Explain why a dominant allele is not always more prevalent in a population.