6.58 PM Tue Jan 21 DNA Content Through Mitosis and Meiosis Activity You are working with a diploid..

6.58 PM Tue Jan 21 DNA Content Through Mitosis and Meiosis Activity You are working with a diploid organism with the chromosome makeup shown below. (Note that the dark chromosomes are paternal in origin and the light ones are maternal). Fill out the charts below to determine the chromosome number in the cells of this organism throughout mitosis and meiosis. Also, determine the number of DNA molecules and the amount of DNA in picograms), as well as the ploidy of the cell, at each stage of the cell cycle. (For meiosis, assume no recombination takes place.) Then answer the questions that follow.

»6.58 PM Tue Jan 21 DNA Content Through Mitosis and Meiosis Activity You are working with a diploid organism with the chromosome makeup shown below. (Note that the dark chromosomes are paternal in origin and the light ones are maternal). Fill out the charts below to determine the chromosome number in the cells of this organism throughout mitosis and meiosis. Also, determine the number of DNA molecules and the amount of DNA in picograms), as well as the ploidy of the cell, at each stage of the cell cycle. (For meiosis, assume no recombination takes place.) Then answer the questions that follow. Part 1: Mitosis Mitosis G1 SG2 Prophase and prometaphase Metaphase Anaphase Telophase and cytokinesis Chromosomes per cel Chromosome status DNA (molecules) per cell DNA (picograms) per cell Ploidy C Klomatine Conosco CONDENSED CONDENSED CHROMAT 6 12 12 12 20 40 40 40 do 40 20 20 20/20 znan an an 6:58 PM Tue Jan 21 Part 2: Meiosis Meiosis Gul 01 l s a Prophese and prometaphase Metaphase! Anaphase Telechase and cytokinesis Chromosomes . DNA (molecules) per cel DNA (picograms) per cel 12 40 Un 12 40 un Ploidy 2n T un Prechend prometaphase Metaphase Anaphasell Tee Telephase land cytokinesis Zygote before ?OOQOOL Chromosomes o OHN’s Chromosome status DNA (molecules) per cel DNA (picograms) per cell 20 40 zo 2n zn zn. Ploidy DNA Content Through macmillan Page 2 of 4 6 58 PM Tue Jan 21 1. How many molecules of DNA are present during and in this cell? 2. At the stage of mitosis when sister chromatids separate, what is the number of chromosomes and DNA molecules in the cell? What’s the cell’s ploidy? 3. During the metaphase of mitosis, how many chromosomes are there in each cell, and how many DNA molecules! 4. Does the picogram amount of DNA in the cell correlate with the number of DNA molecules or number of chromosomes? DNA molecules 5. In the two daughter cells from mitosis, how many of the chromosomes in each cell are paternal in origin? How many are maternal? 6. How many chromosomes are there in this cell in metaphase I and in anaphase 1 of meiosis? Why? 7. Which stage of meiosis produces haploid daughter cells? 8. What is the DNA content of a gamete from this organism (in pictograms)? 9. If the two gametes below were joined during fertilization, which figure below would accurately depict the equivalent zygote chromosomes in G? 6:59 PM Tue Jan 21 End-of-Activity Questions 1. What is the product of mitosis? a. two diploid daughter cells different from the parent cell two diploid daughter cells identical to the parent cell c. two haploid daughter cells different from the parent cell d. two haploid cells identical to the parent cell 2. What is the product of meiosis? a. four diploid daughter cells different from the parent cell b, four diploid daughter cells identical to the parent cell four haploid daughter cells different from the parent cell d. four haploid cells identical to the parent cell 3. In which cell division do homologous chromosomes move to opposite poles of the cell? a mitosis meiosis c. both mitosis and meiosis d. neither mitosis nor meiosis 4. For this activity, you assumed no recombination took place in meiosis. Which stages of meiosis would you draw differently if you did not make this assumption? @everything from end of prophase I onward b. everything from end of prophase II onward c. telophase II and the zygote only d. everything would look exactly the same

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