Mitosis or Meiosis?
This represents a tiny embryo just beginning to form. Once an egg is fertilized, the resulting single cell must divide many, many times to develop a fetus. Both mitosis and meiosis involve cell division; is this type of cell division an example of mitosis or meiosis? The answer is mitosis. With each division you are making a genetically exact copy of the parent cell, which only happens through mitosis.
Mitosis vs. Meiosis
|Purpose||To produce new cells||To produce gametes|
|Number of Cells Produced||2||4|
|Rounds of Cell Division||1||2|
|Haploid or Diploid||Diploid||Haploid|
|Daughter cells identical to parent cells?||Yes||No|
|Daughter cells identical to each other?||Yes||No|
- The goal of mitosis is to produce a new cell that is identical to the parent cell.
- The goal of meiosis is to produce gametes that have half the DNA of the parent cell.
Use the resources below to answer the questions that follow.
Explore More I
- Mitosis and Meiosis Simulation at http://www.youtube.com/watch?v=zGVBAHAsjJM (11:53)
- What are homologous chromosomes?
- How do the location of specific genes compare between homologous chromosomes?
- What is the outcome from mitosis?
- What is a tetrad? Why are they an important feature of meiosis?
- How does meiosis differ between females and males?
Explore More II
- How Cells Divide at http://www.pbs.org/wgbh/nova/body/how-cells-divide.html
- How many daughter cells arise from mitosis? How many daughter cells are produced in meiosis?
- How does the attachment of spindle fibers differ between mitosis and meiosis I?
- Is anaphase I or anaphase II in meiosis more analogous to anaphase in mitosis? Explain your reasoning.
- How many steps are there in mitosis? How many steps are there in meiosis?
- How does interphase I of meiosis differ from interphase II of meiosis?
- What is the goal of mitosis? Of meiosis?
- How many cells are created from cytokinesis following mitosis? Following meiosis?
- Which process, mitosis to meiosis, creates genetically identical cells?
- "Gametes are haploid cells." What does this sentence mean?