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Homework answers / question archive / Scenario 1: In northern Alberta there is a population of approximately 1000 caribou in the Birch Bark Provincial Park*

Scenario 1: In northern Alberta there is a population of approximately 1000 caribou in the Birch Bark Provincial Park*

Biology

Scenario 1: In northern Alberta there is a population of approximately 1000 caribou in the Birch Bark Provincial Park*. Fifty (50) of the caribou from Birch Bark Provincial Park permanently move from this provincial park into a new territory (Jumping Mouse Provincial Park) that has no caribou, but does have a population of mice. Caribou do not eat mice; mice do not eat caribou. These organisms (mice and caribou) do not compete for food.

Scenario 2: In British Columbia, there is another population of approximately 1000 caribou in Moonshine Hills Provincial Park. Three hundred (300) of the Moonshine Hills Provincial Park caribou move into Willow Springs, which is already home to a small population (approximately 300) of the same species of caribou. The Moonshine Hills caribou join the Willow Springs herd and interbreed with them.

For each of the scenarios above:

i. Identify the evolutionary process occurring. Be as specific as possible. Aim for 2 sentences at the most!

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Step-by-step explanation

 

1. Founder effect of genetic drift

The scenario shows founder effect which is type of  genetic drift. In this case, a small group of a larger population move to a new habitat by choice then established a new population. The founder effect happen when the main population( population of mice) remains intact, but is isolated somehow from the new population(caribou). This small population of Caribou will then established a new population. 


2. Gene flow or migration

Migration or gene flow happen on this scenario. It happen when two different population more similar to each other move from one place to another and  thereby changing the composition of the gene pool of the receiving population. As a result, the genes being transferred from one population to another. This gene flow occurs when Moonshine Hills caribou join the Willow Springs herd and interbreed. 

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