MeiosisMeiosis Tutorial
This is from The University of Arizona. It is a description and picture of each step of meiosis, along with another animation. Meiosis for Kids This is a website that explains Meiosis in language that elementary students will understand. |
Meiosis Videos and AnimationsMeiosis Cell Animation
This is from Cellsalive.com Meiosis This is a link to a video on youtube about Meiosis. Meiosis Dance This is a video made by Baylor Universty Students doing what they call "The Meiosis Dance". |
Meiosis Notes
meiosis.docx | |
File Size: | 12 kb |
File Type: | docx |
Blackboard Questions
What are the overall goals of Cell Division with Meiosis? Where and when is this cell division happening?
The main goal of meiosis is to produce 4 genetically different cells used in reproduction. The cells produced are either egg or sperm cells. The cells are all genetically different due to independent assortment that occurs in the cell when each homologous pair decides which chromosome will be on their side before cytokinesis. Also when the homologous chromosomes swap genetic materials, crossing over, more genetic variation is created. Information from lecture notes.
How do the chromosomes found in cells following Meiosis compare with those in G1 cells just starting the cell cycle?
In G1 chromosomes are getting copies were as at the end of meiosis the cells have genetically different chromosomes rather than copying chromosomes. The number of chromosomes are halved by the end of meiosis. Information from Reece, Jane B. Campbell Biology. Ninth ed. Boston: Benjamin Cummings, 2009. Print.
During meiosis, why do the homologous chromosomes separate first, and then the sister chromatids? What does each separation achieve, in terms of reaching the ultimate goal of Meiosis. Give a complete explanation for this, including the difference between homologous chromosomes and sister chromatids.
Homologous Chromosomes are different from sister chromatids because homologous chromosomes are coded for the same gene but they have different alleles. Whereas sister chromitids are exactly identical. By having the homologous chromosomes pair up and swap alleles before the first split they are able to generate much more genetic variation by the end of meiosis. At the end there are 8.4 million different combinations of mom and dad’s chromosomes in the resulting gametes due to the fact that the homologous chromosomes separated first. If the sister chromosomes separated first, there would only be about half as many possibilities. Information from Reece, Jane B. Campbell Biology. Ninth ed. Boston: Benjamin Cummings, 2009. Print.
The main goal of meiosis is to produce 4 genetically different cells used in reproduction. The cells produced are either egg or sperm cells. The cells are all genetically different due to independent assortment that occurs in the cell when each homologous pair decides which chromosome will be on their side before cytokinesis. Also when the homologous chromosomes swap genetic materials, crossing over, more genetic variation is created. Information from lecture notes.
How do the chromosomes found in cells following Meiosis compare with those in G1 cells just starting the cell cycle?
In G1 chromosomes are getting copies were as at the end of meiosis the cells have genetically different chromosomes rather than copying chromosomes. The number of chromosomes are halved by the end of meiosis. Information from Reece, Jane B. Campbell Biology. Ninth ed. Boston: Benjamin Cummings, 2009. Print.
During meiosis, why do the homologous chromosomes separate first, and then the sister chromatids? What does each separation achieve, in terms of reaching the ultimate goal of Meiosis. Give a complete explanation for this, including the difference between homologous chromosomes and sister chromatids.
Homologous Chromosomes are different from sister chromatids because homologous chromosomes are coded for the same gene but they have different alleles. Whereas sister chromitids are exactly identical. By having the homologous chromosomes pair up and swap alleles before the first split they are able to generate much more genetic variation by the end of meiosis. At the end there are 8.4 million different combinations of mom and dad’s chromosomes in the resulting gametes due to the fact that the homologous chromosomes separated first. If the sister chromosomes separated first, there would only be about half as many possibilities. Information from Reece, Jane B. Campbell Biology. Ninth ed. Boston: Benjamin Cummings, 2009. Print.