If Each Interphase Nucleus in a Preparation of Normal Rat

question 29

Multiple Choice

If each interphase nucleus in a preparation of normal rat epithelial cells is found to contain a single Barr body, one can conclude that

• A) the cells are in meiotic prophase.
• B) all of the chromatin in these cells is inactive.
• C) the DNA in these cells has replicated.
• D) the cells are not transcribing any genes.
• E) the cells came from a female rat.

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Definitions:

Effective

Having the intended or desired effect; producing the outcome that was aimed for.

Study Method

Techniques and strategies adopted by individuals to enhance their learning and retention of knowledge.

The Rat Is Always Right

A principle in behavioral psychology and animal studies asserting that the observed behavior of a rat (or other research subjects) in an experiment is the correct response given their understanding of the situation, highlighting the importance of considering the subject's perspective in experimental design.

Humility

The quality of having a modest or low view of one's importance, often leading to a respectful and considerate behavior towards others.