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Q1 – Week 2 – 9/9 – 9/10


9/9 – Thursday – A Day – Academic Study Hall Today

Main focus 
     a) To better understand the chromosome changes in Mitosis and Meiosis and                    how it relates to the Life Cycle of the cell.
     b) How sexual reproduction creates the central tendencies and why they are used 
          in experimental design.


1.  Whiteboard activity –  started drawing 2n = 6 for Mitosis and Meiosis – will finish from Thursday!

2.  Experimental design:  Discussion of controls, IV, DV, Hypothesis

      Biology statistics 1 – IV & DV.pdf
      Biology statistics 1 – IV & DV KEY.pdf  

3.  Central Tendencies, variance standard deviationtypes and why they are used.

       Biology statistics 2 – Central Tendency.pdf

       Biology statistics 2 – Central Tendency Key.pdf

*Connections – We have been learning about “Central Tendencies” primarily at home but I want you to understand  that Central Tendency statistics is very appropriate to BIOLOGY because of the alleles that organisms have are the result of natural selection or evolution.  A synonym for central tendencies is Normal Distribution and the distribution of alleles from populations of organisms will generally fit in a normal distribution or bell curve.
There will be more individuals near the mean (norm) than any other because this allele measured at the mean gives the organism advantage to survive in its current ecosystem.  Individuals at the far left and right of the Normal Distribution curve do not have the same advantage and thus few of them survive before reproducing.  The key here is that the individuals that are multiple standard deviations away from the mean (norm) provide the population with VERY IMPORTANT DIVERSITY that may result in preventing the extinction of the species.  Those few individuals with very different forms of the “norm” allele may struggle to survive in current condition but their frequency COULD rise if condition change and their allele NOW gives them the advantage.  This is Natural Selection. The KEY is that the population must have the diversity before the change in conditions.  If it does not the species will go extinct which is the fate of most species.

Statistics Presentation:

This will help in identifying the phases and chromosomal line of inheritance.


9/9 – Thursday Homework: –

1: Complete Mitosis – Cell Cycle.pdf worksheet and review with the key below.
Homework worksheet & key
Mitosis – Cell Cycle.pdf
Mitosis – Cell Cycle KEY.pdf
View Download
2: Complete Mitosis – Meiosis FormThis is based on Chapter 13 and 14 of your text. You have three graded submissions to this form which is posted below.
Mitosis – Cell Cycle.pdf worksheet Instructions:
You will probably need me to explain this worksheet read the notes below that explain the activity in the worksheet.  What you are going to do is count all of the cells in the field of view of microscope. All this means is that you count all of the cells in your picture which represents what you see in a microscope if you were looking at cells.
A) Using your understanding of Interphase and all of the phases of mitosis you will categorize each cell as either
Interphase, Prophase, Metaphase, Anaphase, telophase, and cytokinesis.  If you have to look at your textbook to review these phases is on page 232 – 234.
B) Once you have categorized each cell then complete the math to determine the  mitotic index.  This is just the fraction or decimal value:
                                          The total number of cells in Mitosis/Total number of cells
The total time in the phase uses the assumption that there is a 24 hour life cycle of these cells. to calculate that calculate the percentage of cells in each phase/ total cells and multiply by 24 hours.  See the video for explanation. It is really easy.
Let me give you an example:
You may disagree with a couple or a few of my cells in some of the categories. You are not wrong to question me! In fact you should always question your teacher!  Considering Prophase starts with “visible chromosomes” condensing one could argue cell #14 is in prophase and you would not be wrong.   I think cell #14 does not show individual chromosomes yet but neither of us are wrong,  just a difference of opinion.  Remember there is really no beginning or end of these phases. It a continuum. Only us humans try to define this. The cell is busy duplicating and does not care!  So if you have a few cells in different categories that are different from me and have a valid explanation then it is perfectly fine. Doesn’t Early Prophase looks like late Interphase?
Homework worksheet & key
Mitosis – Cell Cycle.pdf
Mitosis – Cell Cycle KEY.pdf
View Download
After you have tried the worksheet using my notes above, please view the video below and the key above to review.

Mitosis Cell Cycle worksheet review:  This is for the homework form below..


2: Mitosis – Meiosis Form – Didn’t we have a NORT on these chapters?


   End of Thursday..


9/10 – Friday – A Day – Lab Day

Main focus 
     a) To better connect the statistical concepts of normal distribution through a 
          guided inquiry research laboratory. 
     b) Begin the Fast Plant Lab #1. To investigate whether 2 alleles of the Fast Plants     
           will follow Mendelian genetics. More to follow.


1. Note taking in our Marbled Notebooks regarding the basics and background of the Lab.

        – Will cross dihybrids to obtain F2 generation and compare observed ratios of Phenotypes              with expected Mendelian ratiosa)Plant our Hybrid Fast Plant seeds – DAY 0 – 9/10
2. Assemble the planting apparatus. 
      – Planting F1 generation: ANL anl / YGR ygr – 
      – Planting Testcross group:
3. Setup Lab 2 activity Germination.  


Notes for the Lab will come from the following presentation:


9/10 – Friday Homework: –

1: Complete Basic Note in your Marbled notebooksusing the presentation on fast Plants    

      above.  Make sure you have the parental cross with genotypes and phenotypes as well as the      
     upcoming second generation F2 that we will undergo. Also list the basic objectives of the lab.
     If you do not have a Lab notebook, get one this weekend.
2:  Please view my lecture below on SEM (Standard Error of the Mean).
3:  Complete the Stats 3 worksheet based on the concepts in the lecture. 
       Biology statistics 3 – SEM.pdf
       View Download
4:  Review with the key below:
      Biology statistics 3 – SEM Key p.pdf
     View Download

 Standard Error of the Mean Lecture:  .

End of week 2!