Cell Division Quiz: Mitosis and Meiosis

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Questions and Answers

What structure appears X-shaped in the nucleus of dividing cells?

  • Chromatid
  • Chromosome (correct)
  • Centriole
  • Spindle

What holds sister chromatids together?

  • Nuclear envelope
  • Chromatin
  • Spindle fibers
  • Centromere (correct)

What is the term for body cells containing the full number of chromosomes?

  • Haploid
  • Gamete
  • Somatic
  • Diploid (correct)

During which phase of mitosis do chromosomes line up along the equator?

<p>Metaphase (D)</p> Signup and view all the answers

What is the process called when the cell divides into two new daughter cells?

<p>Cytokinesis (D)</p> Signup and view all the answers

What type of cells contain only half the number of chromosomes?

<p>Haploid cells (B)</p> Signup and view all the answers

What structure moves individual chromosomes during mitosis?

<p>Spindle fibers (C)</p> Signup and view all the answers

What happens to DNA during prophase of mitosis?

<p>DNA condenses and forms chromosomes (A)</p> Signup and view all the answers

Flashcards

Chromosomes

Structures found in the nucleus of dividing cells, appearing X-shaped. They carry genetic information and are composed of DNA tightly wrapped around proteins.

Sister Chromatids

Two identical copies of a chromosome, attached at the centromere. They are separated during cell division to ensure each daughter cell receives a full set of chromosomes.

Nuclear Division

The process by which the nucleus divides into two new nuclei. This occurs during both mitosis and meiosis, ensuring the genetic material is accurately distributed to daughter cells.

Cytokinesis

The final stage of the cell cycle, where the cytoplasm divides, resulting in two daughter cells. This occurs after nuclear division and ensures each new cell has its own independent cytoplasm.

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Interphase

The stage of the cell cycle where the cell grows, carries out its normal functions, and replicates its DNA, preparing for division.

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Centrioles

Structures found in the cytoplasm that help organize the spindle fibers during cell division, ensuring the proper separation of chromosomes.

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Spindle Fibers

A structure formed from microtubules during cell division, attaching to chromosomes at their centromeres and moving them to opposite poles of the cell.

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Centromere

The point where two sister chromatids are attached. It also serves as the point where spindle fibers attach during cell division, allowing the chromatids to be pulled apart.

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Study Notes

Cell Division Reinforcement

  • Chromosomes: Found in the nucleus of dividing cells; appear X-shaped
  • Sister Chromatids: Two identical halves of a chromosome, held together by proteins
  • Chromosomes Composition: Composed of DNA wrapped around proteins
  • Diploid Cells: Body cells containing the full chromosome number (46 in humans)
  • Haploid Cells: Sex cells with half the chromosome number
  • Cell Cycle Stage (Interphase): Cell copies DNA and performs normal functions
  • Mitosis Stage (Prophase): DNA condenses into chromosomes
  • Mitosis Stage (Metaphase): Chromosomes line up along the cell's equator
  • Mitosis Stage (Anaphase): Chromatids separate and move to opposite sides
  • Mitosis Stage (Telophase): Nuclear membrane forms around each set of chromosomes
  • Cytokinesis: The cell divides into two new daughter cells
  • Centrosomes/Centrioles: Structure that anchors the spindle fibers
  • Spindle Fibers: Structure that moves individual chromosomes during mitosis

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