9/28 Selection simulation

 1. The strength of selection influences allelic frequency over generations.

       a. Under what circumstances do we expect to see an increase in allelic frequency?

If the red allele frequency is higher than the blue allele frequency and their relative fitnesses are the same, the red allele frequency still increases. This way bb fitness would not need to be reduced. If the blue allele initial frequency is higher than the red, the bb relative fitness needs to be low for there to be an increase in red allele frequency.

       b. What influences how quickly allelic frequency changes?

 The initial allele frequency and the relative fitnesses of each genotype influence how quickly allelic frequency changes.

2. Population size influences the change in allelic frequency over generations. In some of the simulations the red lines went to zero. Why? Why didn't this always happen?

If the red line went to zero that meant the red allele frequency is zero. This can occur when there are pressures or events that reduce the fitness of rr or rb individuals and therefore red allele frequency. In this simulation the red line represents the red allele frequency with genetic drift, which can account for events such as hurricanes and floods. Smaller populations are more susceptible to genetic drift. Large events like hurricanes do not always occur which accounts for the red lines that did not go to zero.

Follow this link to see a story book about the simulation!

https://www.storyjumper.com/book/read/88958855/5f75d429e3ef3