Posted in 3/4 SBI3U Biology

SBI3U Gametogenesis & Conception Assignment – Due Tuesday March 27

Instructions – Complete the spermatogenesis, oogenesis and conception handouts using the following instructions.

The analysis questions can be submitted on D2L under the Assessment –> Assignments section.  Or they can be printed off and handed in with the other work.

  1. Use two different colours for the chromosomes from dad’s parents and complete the spermatogenesis diagram. For example, dark blue for the chromosomes from dad’s dad, light blue for the chromosomes from dad’s mom.
  2. Use two new colours for the chromosomes from mom’s parents.  For example, red for the chromosomes from mom’s dad and pink for the chromosomes from mom’s mom.
  3. Make sure each chromatid has a least one cross-over.
  4. Make sure that the cross-overs for spermatogenesis are different than oogenesis.
  5. Randomly choose one of the four sperm that were generated to create the zygote on the conception sheet.  Draw the chromosomes as they would be right after the sperm and egg meet.

Analysis

  1. Below every cell in all of your diagrams identify it as diploid or haploid.
  2. Within every cell in all of your diagrams, identify the form the chromosomes are in.
  3. Whose genes did the zygote get most of from:
    a) mom (i.e. mom’s mom or mom’s dad)? b) dad (i.e. dad’s mom or dad’s dad)?  Justify your answer.
  4. Based on your drawings and knowledge, what is the overall purpose of meiosis I? (i.e. refer to your drawings and knowledge in your answer) Justify your answer.
  5. Based on your drawings and knowledge, what is the overall purpose of meiosis II? (i.e. refer to your drawings and knowledge in your answer).  Justify your answer.
  6. In terms of chromosome distribution (independent assortment), we tossed coins to figure out where chromosomes would go. How many total coin tosses would there be in meiosis of a human cell?  Explain how you arrived at this number.
  7. Explain how it is impossible (other than for identical twins) for one zygote to be genetically identical to another.
  8. i) When (from start point to end point) does meiosis happen in a) males?  b) females?
    ii) Why is the number of gametes that come from a single primary oocyte different than the number of gametes that come from a single primary spermatocyte?
  9. What does the Catholic Church teach about the value of the zygote? How does this teaching relate to the use of human embryonic stem cells?  What is a source of stem cells that could be used that would be acceptable to our religion?  (Note:  you will need to refer to the Catechism of the Catholic Church or the YOUCAT to answer these questions.)

Cite your sources using APA referencing.  Both in-text and end-of-text are required for information acquired outside of class.  If you use the textbook, you must cite this too.

6 thoughts on “SBI3U Gametogenesis & Conception Assignment – Due Tuesday March 27

  1. Can you make a post listing the credible sources you named in class? The only things I’m finding are sources that don’t seem reliable and I can’t remember the sources you named.

    1. sciencedaily.com is one of them. The others are not really related to meiosis. Part of research is learning how to know if a source is reliable. Look for accredited sites or ones affiliated with universities, research institutions or the like. Khan Academy is good too. Avoid wikis and discussion boards like yahoo answers etc.

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