The mitosis slides are located in the second back room. They can be a challenge to look at. If they can be found then your teacher will assist you in observing these prepared slides .
Draw mitosis under high power in the light microscope in 3 pictures. Label the stages of mitosis
Edmund Beecher Wilson - Figure 2 of: Wilson, Edmund B. (1900) The cell in Development and Inheritance (2nd ed.)
steps of cell cycle: you should write a table showing the steps as well as the FORM OF DNA role of other organelles
1. INTERPHASE - a. cell is undergoing growth. After a period of growth, it prepares to divide b. cell replicates its DNA. Nuclear membrane is still intact 2. PROPHASE Nuclear membrane disappears and the chromosomes are visible 3. METAPHASE chromosomes line up in the middle and Centrioles send out the spindle fibres to attach to the centromere 4. ANAPHASE centromeres get ripped apart and thus the chromosomes get ripped apart into separate chromatids 5. TELOPHASE nuclear membrane reforms around the chromatids 6. CYTOKINESIS chromatin is in the nucleus now.
Although you studied mitosis and meiosis last year, it is worth a look again to make sure you have all the steps down correctly. It will help you to understand our next unit which is Genetics. This video explains how alleles are connected to the steps of mitosis and meiosis. I also assume this is familiar from last year.
Your teacher will review these steps, explaining some of the complex parts and give you time to answer the questions. Next, your teacher will review the answers to the questions. After this you will do a creative assignment to demonstrate that you understand this material.
Please watch this video
Answer the following questions on your own paper and hand this in.
Answer in full sentences and draw your answers. Draw in ink or photograph a model using lego, string or other material
1. What is Chromatin? How many strands are there in a human? 2. How many chromatids are there in a human? 3. What is the 2n or diploid number? 4. What is mitosis used for? 5. What is meiosis used for? 6. Define "Gamete" 7. What is the Haploid number? 8. What organ makes sperm, what makes egg? 9. How many chromatids are in a sperm or egg? 10 Draw a fertilization 11. Draw how sperm cells are made using the number 46 to represent the chromatid number. 12. Draw and label Chromatin, Chromatid, Sister chromatids, Chromosome. And show me a homologous chromosome 13. Draw a mitosis with 2n= 6. Label the stages in detail. Remember to draw Interphase and show chromatins. 14. Draw a meiois with 2n=6. Label the stages. Again, draw interphase and show the chromatin. 15a. Why does crossing over happen during prophase I? 15b. What is primary nondisjunction. What can happen to the chromatid number?
16. The word chromosome is very tricky it's true definition is:
1 chromosome = 2 identical sister chromatids joined together in a centromere, What is the other definition and why can it be a very tricky word?
17. Write the steps of meiosis and mitosis side by side. (this is at the end of the video)
You can also take a look at this resource. It is meiosis and mitosis from a college level text book. This is extended reading for those who are interested in going through biology. I think many of you can actually handle this level.
Watch all three videos on DNA replication. Start with my lecture video. Your online quiz on friday will include this content!
This DNA replication Song was made by my students in 2007. They were grade 11 students taking my bio 12 course. Their music teacher is the same as your band teacher now.
Assignment : Answer the following questions in a creative format
1. Why does DNA replication happen? Give three reasons 2. a. Draw a nucleotide and identify the 5' end and the 3' end b. draw a DNA ladder structure and label the 5' and 3 ' end
3. Compare and contrast DNA and RNA. a. What are they made of? b. What are their nitrogen bases? c. What enzymes synthesize DNA and RNA? d. How does DNA polymerase join one nucleotide with another nucleotide?
4. What are the main steps of DNA Replication. Include details of what each enzyme does a. Helicase b. Primase c. DNA pol III d. exonuclease e. DNA pol I f. ligase
5. In what direction does DNA polymerase synthesize the new DNA strand? 6. How is the lead strand different from the lag strand? 7. What is an okazaki fragment?
Watch my videos on DNA, review the concepts in the slides below and use class time to complete the assignments which are due on Friday.
Here is another video from youtube which explains these concepts in more detail.
Assignment - 15 points SUMMARIZE THE MAIN POINTS OF DNA NOTES 10 points
A. Summarize the main points of the DNA notes AND the DNA slide showin a Cartoon Format and make a clear photo of this cartoon. upload your assignment in Microsoft Teams. Include the details about Watson and Crick and Franklin.
EVALUATION rubric 10 points: You included all the main points in a colourful, creative format which is written in ink and coloured. You used humour and creativity and your assignment stands out for showing an understanding of the key points
8-9 : you include all the main points and you show excellence and creativity. your assignment is in colour and inked
5-7 : you include most of the main points and your assignment is handed in. It is a good start and You needed more time to finish this.
2-4: you handed something in that was not quite complete, although it is a pretty good start
You may do Assignment 3 Aas a poem that rhymes if you don't want to draw.
3B. take a picture of your drawing of this worksheet filled out: You may redraw it or edit it in Paint. 5 points
