In the figure below, which models DNA semiconservative replication, the numeral I points to ________, II points to ________, and III points to _______. 
Definitions:
Constraints
Factors or conditions that limit or restrict choices, actions, or outcomes within a given context or system.
Large-Scale Patterns
Broad trends or structures in society that affect groups and institutions in significant ways.
Never-Married Parent
An individual who has one or more children but has never been legally married, which may have specific social, legal, and emotional implications.
Proportion
A part, share, or number considered in comparative relation to a whole; the relationship of one thing to another in terms of quantity, size, or number.
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