Transfers and subculture
By the end of this lesson
- Explain what changes during subculture
- Preserve parent-child relationships
- Record destination treatment and transfer context
See it
Subculture moves material to fresh culture conditions or divides it into derived cultures. Each transfer can change lineage, vessel count, medium context, contamination exposure, and developmental state.
Understand it
Explain what changes during subculture
Create child records or preserve parent-child relationships.
Subculture is an action involving culture material and fresh conditions, often creating derived records.
Preserve parent-child relationships
Record date, operator, destination medium/version, and location.
Parent-child links keep derived material traceable to its source.
Record destination treatment and transfer context
A transfer is both a biological action and a traceability event.
A transfer adds history rather than rewriting the prior state as if it never existed.
Worked example
A parent culture is divided into three child vessels on fresh medium. Create the children with parent links and their actual destination medium/version. Keep the parent's earlier state available rather than rewriting it as the three new cultures.
Explain your decision before opening the worked reasoning below.
Show the worked reasoning
Transfer context connects the biological action to the actual treatment and handling event.
Several meaningful parts of a culture's context can change at transfer and should remain connected in history.
Do not overwrite the parent record as if the previous state never existed.
Try it
How should the example's parent record be handled?
Use the worked example above to explain your answer in your own words before taking the quiz.
Lesson quiz
Assessment version: 2026-10-15-v2. Previous reading-completion markers are retained. This revised quiz has its own result.
Apply it
Use the worked example to write a short decision record: what did you observe, which rule did you apply, and what would you check before acting?
Completion marks reading progress, not a quiz pass or professional certification.