Suppose a small part of Michigan breaks off from the rest of Michigan and over time travels into the middle of Lake Michigan. Originally, there was a species of tree frogs that lived in
Michigan and now a small group of them are separated onto the Michigan island. The
mainland frogs were all greenish-brown in color at first. After 10,000 years, we find that all
of the tree frogs on the Michigan island are green and all of the ones on the mainland are still
greenish-brown.
Which of the following could be a description of what happened to the island frogs?
The frogs on the island underwent mutation and natural selection
The frogs on the island had a crossover event
The frogs on the island had genes for green, so their babies received those genes as well
The frogs on the island decided to change to green to better match the plants of the island