Day 25 Meiosis
These are optional videos as an extra resource if you need help on any of these topics
Mitosis Videos Watch all six Mitosis Videos
Meiosis Videos Watch all six Meiosis Videos
Stem Cells and Cancer Videos Watch all five cell regulation videos
Meiosis
The difference between Mitosis and Meiosis
Meiosis is the making of haploid cells
-These haploid cells are used for sexual reproduction
-The point of meiosis and therefore the point of sexual reproduction is diversity
-Joining of two gametes from two different parents allows for millions of different genetic combinations
-Even the joining of two gametes from the same parent allows for diversity since the genes expressed will be different
-Meiosis is NOT SEX! Meiosis is the process of making the cells used during sexual fertilization
-Once again Mitosis is the process of dividing and copying regular body cells (somatic cells)
-And Meiosis is the process of dividing and copying sex cells (gametic cells)
-The reason Meiosis is different than Mitosis is because the genetic material has to be split in half
Meiosis I
Meiosis II
Meiosis produces variation...but how much variation?
A Mosquito has 3 pairs of chromosomes so mathematically we can figure out how many different possible gametes a mosquito can make by taking 2 to the power of 3. 2 to the power of 3 equals 8 so a mosquito can make 8 different gametes.
How many different gametes can a human produce?
Assignment: Fold 8 blank sheets of paper in half and staple them to make a book. On each page you are going to draw one of the stages of meiosis and in your own words describe how you can identify that stage. Also include how that stage is different than the matching stage in meiosis.
Stages:
Meiosis I:
Prophase I
Metaphase I
Anaphase I
Telophase I
Meiosis II:
Prophase II
Metaphase II
Anaphase II
Telephase II