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In a reforestation project,a fast-growing pine tree (fast-growing due to a dominant A allele)was selfed,and the resulting seed were planted on two islands (X and Y).One year after planting,there was a severe termite attack on Island X.The termites,which killed all slow-growing trees,destroyed 25% of the trees on the island.A severe cyclone struck Island Y and randomly killed 25% of its trees.Justify all answers.
a)With the information provided above,can you suggest the genotype of the original fast-growing tree that was selfed to obtain seed?
b)What evolutionary force is at work on Island X?
c)What evolutionary force is at work in Island Y?
d)Following the termite and cyclone attacks,which of the pine populations (X or Y)will have the most genetic variation?
e)Suppose that the cyclone that struck Island Y did so early in the year,before the emergence of the slow-growing trees.In this case,what evolutionary force is at work on Island Y?
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