Biology Mitosis And Meiosis Essay
Biology Mitosis and Meiosis Study Guide Videos if you want/need them. https://www.youtube.com/watch?v=L0kenzoeOM https://www.youtube.com/watch?v=qCLmR9YY7o Maybe helpful sites? http://www.cellsalive.com/mitosis.htm http://www.cellsalive.com/cell_cycle.htm
1.
Diagram and label a chromosome.
2.
Describe the structure of a nucleosome. What is the role of the nucleosome in supercoiling AND in the regulation of transcription (You will have to check Campbell
Ch. 18pp.) The nucleosome is basically
3.
Interphase is broken down into distinguishable phases. What are these parts of
Interphase and what happens in the cell for each?
Interphase is broken down into G
S phase, and G
. During G …show more content…
The events of the cell cycle are controlled by cyclins, which is basically all you need to know.
However, if you want to know more, cyclins act as activators for Cyclindependent Protein
Kinases, which signal the cell cycle to continue through phosphorylation. 6.
What are the defining events for each of the four phases of mitosis?
I think the best way to show this is with a chart list hybrid:
Prophase
Nuclear envelope dissolves, centrioles start making microtubules, nucleolus disappears, and chromosomes supercoil,
Metaphase
Chromosomes line up in the middle of the cell (cell equator), asters are visible and in place at each end of the cell.
Anaphase (A.K.A Arnoldphase)
The chromosomes are pulled apart (really the kinetochores eat the microtubules).
Telophase
Cytokinesis (once you can see the cell starts to split, then its in telophase), chromosomes start to uncoil, nuclear membrane reforms, nucleolus returns,
Interphase again
the moment the cell has split both cells enter interphase. 7.
What is cytokinesis, and where does it fit in the cell cycle?
Cytokinesis is when the cell physically separates into two new cells. In animal cells, …show more content…
Then crossing over occurs which increases genetic variability. In meiosis II, the two haploid cells that contain two sister chromatids split into two haploid cells that contain one pair of sister chromatids.
10. What is the final result of meiosis in human males ( # of cells, # of chromosomes, term inology )? How are females different? What is the final result of meiosis in human males
(# of cells, # of chromosomes, terminology)? How are females different?
ANS: At the end of meiosis for human males, there are four haploid cells that are formed that contain half as many chromosomes as the parent cell. In females, one egg cell is created with 3 polar bodies which die. The female egg contains half as many chromosomes as the mother.
11. What is nondisjunction during meiosis? What events lead to this occurring, what actually happens, and what are the rami fications?What is nondisjunction during meiosis?
What events lead to this occurring, what actually happens, and what are the ramifications?
ANS: Nondisjunction is when the members of a pair of homologous chromosomes or a pair of homologous chromosomes or a pair of sister chromatids fail to separate
1.
Diagram and label a chromosome.
2.
Describe the structure of a nucleosome. What is the role of the nucleosome in supercoiling AND in the regulation of transcription (You will have to check Campbell
Ch. 18pp.) The nucleosome is basically
3.
Interphase is broken down into distinguishable phases. What are these parts of
Interphase and what happens in the cell for each?
Interphase is broken down into G
S phase, and G
. During G …show more content…
The events of the cell cycle are controlled by cyclins, which is basically all you need to know.
However, if you want to know more, cyclins act as activators for Cyclindependent Protein
Kinases, which signal the cell cycle to continue through phosphorylation. 6.
What are the defining events for each of the four phases of mitosis?
I think the best way to show this is with a chart list hybrid:
Prophase
Nuclear envelope dissolves, centrioles start making microtubules, nucleolus disappears, and chromosomes supercoil,
Metaphase
Chromosomes line up in the middle of the cell (cell equator), asters are visible and in place at each end of the cell.
Anaphase (A.K.A Arnoldphase)
The chromosomes are pulled apart (really the kinetochores eat the microtubules).
Telophase
Cytokinesis (once you can see the cell starts to split, then its in telophase), chromosomes start to uncoil, nuclear membrane reforms, nucleolus returns,
Interphase again
the moment the cell has split both cells enter interphase. 7.
What is cytokinesis, and where does it fit in the cell cycle?
Cytokinesis is when the cell physically separates into two new cells. In animal cells, …show more content…
Then crossing over occurs which increases genetic variability. In meiosis II, the two haploid cells that contain two sister chromatids split into two haploid cells that contain one pair of sister chromatids.
10. What is the final result of meiosis in human males ( # of cells, # of chromosomes, term inology )? How are females different? What is the final result of meiosis in human males
(# of cells, # of chromosomes, terminology)? How are females different?
ANS: At the end of meiosis for human males, there are four haploid cells that are formed that contain half as many chromosomes as the parent cell. In females, one egg cell is created with 3 polar bodies which die. The female egg contains half as many chromosomes as the mother.
11. What is nondisjunction during meiosis? What events lead to this occurring, what actually happens, and what are the rami fications?What is nondisjunction during meiosis?
What events lead to this occurring, what actually happens, and what are the ramifications?
ANS: Nondisjunction is when the members of a pair of homologous chromosomes or a pair of homologous chromosomes or a pair of sister chromatids fail to separate