There are two stages of Meiosis and four phases that occur within both of those stages. Essentially the outline of Meiosis is as follows:
Meiosis I
-Prophase I
-Metaphase I
-Anaphase I
-Telophase I
Meiosis II
-Prophase II
-Metaphase II
-Anaphase II
-Telophase II
Before a cell can enter into Meiosis it is in Interphase, which is when a cell is in it’s normal non-dividing activity. During Interphase, before the cell enters into Meiosis, all of the chromosomes undergo replication.
A chromosome and it’s replica are joined together around the middle and together make up a structure known as a sister chromatid. When a sister chromatid is separated it becomes two chromosomes, giving the cell enough genetic information to divide into multiple cells later on.
Summary of Meiosis:
Meiosis starts with a diploid germ cell and results in a final outcome of four haploid cells.
Questions to Consider:
- What is a diploid cell? What is a haploid cell?
- What is the product of Meiosis I? What is the product of Meiosis II?
- What is being separated in Meiosis I? What is being separated in Meiosis II?
- Why is it essential that Meiosis produces haploid cells? What would happen if sex cells were produced by Mitosis? How would this affect sexual reproduction?
Resources to Help:
Meiosis Diagram
Meiosis Video
Assignments:
-Meiosis Vocabulary Sheet-Due Friday, March 25th
-Diagrams of Meiosis I and II on back of vocab sheets-Due Friday, March 25th
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