what plan proposed a bicameral legislature with two senators per state and a house of representatives based on population?

The Great Compromise

Explanation:

The Connecticut Compromise (also known as the Great Compromise of 1787 or Sherman Compromise) was an agreement that large and small states reached during the Constitutional Convention of 1787 that in part defined the legislative structure and representation that each state would have under the United States Constitution. It retained the bicameral legislature as proposed by Roger Sherman, along with proportional representation of the states in the lower house, but required the upper house to be weighted equally among the states. Each state would have two representatives in the upper house.

Answer:Connecticut Compromise is the answer