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Oogenesis
The formation of the ovum (mature female gamete) from undifferentiated germ cells is called oogenesis. This process takes place in the ovaries (female gonads). Oogenesis consists of three stages known as the multiplication phase, growth phase, and maturation phase.
Cell Division
Cell division involves the formation of new daughter cells from the parent cells. It is a part of the cell cycle that takes place in both prokaryotic and eukaryotic organisms. Cell division is required for three main reasons:
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- QUESTION 17 Which of the following events describe the mechanism of a cell cycle checkpoint? (choose more than one if applicable) If you really want to challenge yourself, figure out which cell cycle checkpoint is described by each of your choices. Questions about this topic are commonly missed on the unit 3 exam! U A Cdk is phosphorylated, turning it off. This prevents the cell from entering the next phase before it is ready. A ubiquitin ligase is activated to target a Cdk for destruction. Since the Cdk is destroyed, it cannot be active and therefore cannot cause entry into the next phase of the cell cycle. A Cdk inhibitor protein is transcribed and translated when it otherwise wouldn't be, which turns off a Cdk and prevents the cell from entering the next phase before it's ready. A ubiquitin ligase is inhibited, preventing the proteolysis of proteins that must be destroyed in order for the cell to advance to the next step in the cell cycle. One of these proteins that is not destroyed…Question 8. A cell that has converted to a state of permanent cell cycle arrest is said to be in a state of Short AnswerQUESTION 27 Activation of at the metaphase to anaphase transition leads to the activation of APC/C activity. CDC20. CDK. M-Cyclin. Securin.
- Question 4 Review cell cycle. Which of this is not a part of interphase? G1 G2 OS OMQUESTION 2 [20]In your own words explain the term “phagocytosis” and discuss the three (3) stages that are involved in the processQUESTION 7 Match the stage of mitotic cell division with its description. vchromosomes line up in the middle of the cell on spindle fibers cytoplasmic division results in two new cells A. interphase sister chromatids separate and daughter chromosomes begin moving to opposite poles B. anaphase C. telophase nuclear membrane disintegrates, DNA condenses, spindle highways begin to D. metaphase be formed E. prophase F. cytokinesis daughter chromosomes arrive at opposite ends of the cell, the cell |- vmembrane pinches in, nuclear membranes form Ev DNA replication and organelle doubling
- QUESTION 5 Which of the following puts the stages of mitotic cell division in the order that they happen in? anaphase, cytokinesis, interphase, metaphase, prophase, telophase O A. interphase, prophase, metaphase, anaphase, telophase, cytokinesis O B. cytokinesis, prophase, metaphase, anaphase, telophase, interphase O D. interphase, metaphase, anaphase, prophase, telophase, cytokinesis QUESTION 6 What would be the result of a mitotic cell division of a cell with 46 chromosomes? A. a cell with 92 chromosomes B. two cells with 46 chromosomes each C. two cells with 23 chromosomes each D. four cells with 23 chromosomes eachQuestion 7 Which of the folowng statements about an adult animal with a newly-acquired mutation in a somatic cell is true? O Some (but not all) of the animal's offspring wil carry the mutation. OAl d the animal's offspring will carry the mutation. O The animal but not ts offspring, might be affected by the mutation.Question 5 of 10 Question 5. DNA replication and the production of additional histones occur during what part of the cell cycle?