This drawing depicts some of the key structures involved in the biological basis of heredity. After studying the image, identify the letter that labels a chromosome. 
Definitions:
Private Firms
Businesses that are owned, operated, and managed by private individuals or entities rather than by the government or public.
Consumers
Individuals or groups that purchase goods and services for personal use.
Market System
An economic system where decisions regarding investment, production, and distribution are guided by the price signals created through the forces of supply and demand.
Public Good
A public good is a product or service that is non-excludable and non-rivalrous, meaning it can be consumed by anyone without reducing its availability to others.
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