Would It Be Possible to Observe Crossing-Over Between Sister Chromatids

question 46

Multiple Choice

Would it be possible to observe crossing-over between sister chromatids? Why or why not?

• A) No. Crossing-over is not observable.
• B) No. Sister chromatids are not present within the same nucleus.
• C) No. Since they are genetically identical you could not tell the difference without labeling the chromatids.
• D) Yes. Sister chromatids look different from each other.
• E) Yes. One sister chromatid comes from mother and one comes from father.

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