Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Question
Transcribed Image Text:**Question:** The duplicated chromosomes are seen lined up in the center of the cell during
- ○ Prophase
- ○ Metaphase
- ○ Telophase
- ○ Anaphase
- ○ S-phase
**Explanation:**
In the context of cell division, particularly mitosis, this question focuses on identifying the stage at which duplicated chromosomes align in the center of the cell. This alignment is crucial for the equal separation of chromosomes into the two daughter cells.
**Correct Answer: Metaphase**
During metaphase, chromosomes are aligned at the metaphase plate, an imaginary line equidistant from the two centrosome poles of the cell. This ensures that each new cell will receive an identical set of chromosomes.
**Other Stages:**
- **Prophase:** Chromosomes condense, becoming visible, and the mitotic spindle begins to form.
- **Telophase:** Chromosomes de-condense, and the nuclear envelope reforms around each set of chromosomes.
- **Anaphase:** Sister chromatids are pulled apart toward opposite poles.
- **S-phase:** Part of interphase, where DNA is replicated, not a stage of mitosis itself.
Expert Solution
Step 1
A sequence of various events take place when a cell starts to grown and divide, this series of events is termed as the cell cycle. A cell cycle comprises of different stages which includes prophase, metaphase, telophase, anaphase etc.
The chromosomes of cell undergo several changes while going through these phases of cell cycle.
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