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sue sue
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Posts: 2
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7 years ago
As the chromosomes of a parent cell are duplicated and distributed to the two daughter cells during cell division, the structure of the chromosomes changes.

Answer the three questions for each phase of the cell cycle by dragging the yes and no labels to the appropriate locations in the table.
Note: Assume that by the end of the M phase, the parent cell has not yet divided to form two daughter cells.

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Staff Member
7 years ago
Changes in DNA structure during the cell cycle

As the chromosomes of a parent cell are duplicated and distributed to the two daughter cells during cell division, the structure of the chromosomes changes.

Answer the three questions for each phase of the cell cycle by dragging the yes and no labels to the appropriate locations in the table.

Note: Assume that by the end of the M phase, the parent cell has not yet divided to form two daughter cells.

Correct

Sister chromatids form when DNA replicates in the S phase. The sister chromatids become individual chromosomes once they separate in early anaphase.

Similarly, the cellular DNA content doubles in the S phase when the DNA replicates. However, the cell’s DNA content does not return to its normal (undoubled) levels until after cytokinesis is complete and two daughter cells have formed.

The condensation state of the DNA is not related to the presence or absence of sister chromatids. The DNA condenses in prophase and remains condensed until after the sister chromatids separate and the new daughter cells begin to form. In late telophase/cytokinesis, the emphasis shifts to cell growth and DNA replication for the next cell cycle. For these processes to occur, the DNA needs to be de-condensed so it is accessible to the cellular machinery involved in transcription.
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- Master of Science in Biology
- Bachelor of Science (Biology)
- Bachelor of Education
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wrote...
7 years ago
...I love you  Heavy Heart
wrote...
7 years ago
Thank you so much! I had the same question!
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6 years ago
Thank you I literally looked everywhere for this answer for the past two days  Face with Stuck-out Tongue
wrote...
6 years ago
This is a good reference for Genetics-related questions!
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6 years ago
Thank you!
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A year ago
Thank You!
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10 months ago
thank you
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