The Articles of Confederation were the first Constitution of the US. The Articles created a single house of representatives, called Congress of the Confederation. It was a unicameral body.
Each state had one vote, despite having more or less population. The Congress would meet annually and when the Congress was not in session a Committee of the US would be in charge.
When the U.S Constitution was written there were many problems with representation since the Articles of Confederation. Because of this, they created a bicameral Congress. The Senate would have equal representation of states with two representatives each. The House of Representatives has a different system, the number of representatives varies from the state's population. This solved the problem with representatives in the US.
"If you put one overcoat in your suitcase, you can't put anything else in. So, whatever you could wear, wear it," said Kay Sakai Nakao, who was 22 years old at the time.