Question

Hello guys just double checking the answers my biology genetics study guide. Please go ahead and answer ALL the questions you see below, if you can't answer all then PLEASE let someone else do them! High rating only given to ALL questions complete

Please answer following 2 questions!

Jiivi Chunky 0.5 0.5 0.2 0.3 0.46 0.5 0.55 0.58 0.67 0.78 Carta Shells Natura 0.5 0.5 0.43 0.5 0.5 0.5 0.44 0.5 0.64 0.48 0.45 0.44 0.65 0.47 0.49 0.36 0.68 0.46 0.52 0.33 0.7 0.39 0.61 0.1 0.77 0.37 0.67 0.09 0.79 0.34 0.72 0.08 0.28 0.82 0.81 0.25 0.9 0.03 0.83 0.23 0.92 0.85 0.21 1 0 0.87 1 0. 1 0 1 0.03 1 1 0 1 0 Allele frequency 0.8 0.07 0.8 1 2 3 4 5 6 10 11 12 13 14 15 7 8 9 Generation 0.82 0.85 0. 9 1 - Chunky — Jiivi — Carta — Shells Natura

Q1 ) Chart shows ni+ allele frequency in population size for 5 islands over 15 generations. Answer

a. Which evolutionary force is responsible for variation in ni+ allele freuqnecy is it drift or migration? Explain

b. Which island has ni+ allele fixation?

c. What it means for allele to reach fixation?

d. If Jiivi had a larger population size while other coniditons stay the same, how does larger population effect fixation for one allele? (just describe no calculation needed)

Q2)

Answer 1

1 a) Genetic drift refers to the alteration in allele frequency over generation as result of chance events such as natural disasters. It could lead to loss of allele or allele fixation. On the other hand, migration refers to movement of one allele from one population to another population. Migration causes change in allele frequencies when individuals migrate in and out from one population to another. However, it does not lead to loss of allele or allele fixation that can be depicted from the data shown, therefore genetic drift is responsible for the variation of ni+ allele frequency.

b) The islands Chunky, Jiivi and Shells have reached ni+ fixation as the allele frequency at reached 1.

c) Allele has achieved fixation when it has reached 100% frequency and the other allele is completely lost.

d) Genetic drift has more pronounced effect on a small population size because there would be a drastic modification of allele frequency and loss of heterozygosity in the population. For example, consider two boxes of colored balls, one small and one large box and removing a handful of balls from the large box would affect the color composition but doing the same with the small box will have a much higher impact and you will have less colors to choose from afterwards. Therefore if Jiivi had a larger population size and all the conditions would remain same then it will be less affected by genetic drift and hence will be at lower risk of allele fixation.

2. The correct answer is ' The individuals are genetically similar' . This is an example of genetic drift where there is a drastic change in allele frequencies and the population has suffered a huge loss of heterozygosity.