Which of the following statements are true? a. after contromeres divide, chromatids are known as chromosomes b. centromeres are seperated during anaphase c. during anaphase, some microtubles become shorter and pull sister chromatids in opposite direction d. all these are true
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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:
Which of the following statements are true?
a. after contromeres divide, chromatids are known as chromosomes
b. centromeres are seperated during anaphase
c. during anaphase, some microtubles become shorter and pull sister chromatids in opposite direction
d. all these are true
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- Which of the following statements are true (Select all that apply) A. The nuclear envelope dissolves in the metaphase and reforms in telophase B. In prophase, chromosomes condense into compact structures C. The spindle forms and attaches to chromosomes in prometaphase D. In anaphase, each sister chromatid moves toward the spindle pole to which it is attached.Explain: The cell has ----- Chromatides during g2. ------- Chromatides during a phase and. _________Chromatides during metaphase .Match the following terms with the correct description Telophase A. The cytoplasm of a single cell divides to form two daughter cells. Metaphase B. Condensed and highly colled chromosomes move to a central zone. Prophase C. During this phase, chromatin condenses into two Identical coples of each chromosome. V Anaphase D. Chromosomes begin to pull toward opposite ends. Cytokinesis E. The nuclear envelopes will form around each nucleus and the nucleol will reappear.
- Choose the description in column 2 that best matches each structure/protein in column 1. actin filament ring centrosome interpolar microtubule sister chromatids kinetochore microtubule lamins centromere…This is a picture of Prophase: Explain why you know this cell is in prophase using 2 vocabulary words from this list (definitions are in question 1): Nuclear envelope/nucleus Chromatin chromatid/sister chromatid Chromosome Spindle 24 étv Aa MacBook Air 80 888 DII DD F3 F4 F5 F6 F7 F8 F9 F10 @ # $ & з 4 6. 7 8 9 W E R Y P D F G H J K > V M. V BThis is a picture of Prophase: Explain why you know this cell is in prophase using 2 vocabulary words from this list (definitions are in question 1): Nuclear envelope/nucleus Chromatin chromatid/sister chromatid Chromosome Spindle r25.044 etv Aa MacBook Air DII DD 80 F7 F10 F11 F4 FS F2 F3 @ # $ & * 2 3 4 8 9 W E R T Y P F G H J K S > C V N M 3D command .. *- V B
- The primary function of Asters in mitosis is Select one: O a. The production of microfilaments spindles to separate the two sister chromatids O b. The formation of microfilaments needed to hold chromosomes O C. The formation of microtubule spindles to separate the daughter chromosomes O d. The dissociation of the nuclear envelop O e. Formation of a cleavage furrowWhich phase is described below? The chromosomes condense, Each is made of two sister chromatids,(looks) like an "X" Each sister is a clone, the closest of kin, And acentromere connects them like siamese twinsThe nucleolus disappears it melts away, as the cell takes a ribosomeproduction holiday, the centrosomes separate, start spindle formationfor separating chromatids and cell elongation.The diagram below shows a model for the normal regulation of the transition to anaphase during mitosis. 1. Signals are released by unattached kinetochores that cause MAD to bind CDC20. MAD CDC20 6. Chromatids separate as mitosis procoeds to anaphase. COHESIN 3. The APCCDC20 CDC20 complex ubiquinates Securin. APC 2. When all kinetochores are attached, MAD releases CDC20 which then combines with APC UBIQUITIN SEPARASE . Separase destroys Cohesin APC SEPARASE SECURIN 4. Securin is destroyed, releasing Separase Your analyses of cancer cells that do not regulate this transition normally indicate that: MAD is binding to CDC20; • Ubiquitin is not attached to securin; • Sister chromatids separate and move to opposite poles of the cell. Which of the following explanations could account for all of your observations? a. The cell has an alteration in MAD that prevents it from releasing CDC20 when the 'unattached kinetochore' signal stops. O b. More than one of the other answer choices are correct.…
- Matching Terms: A. Prophase B. Anaphase C. Telophase D. Metaphase E. Interphase _____1. The sister chromatids are moving apart. _____2. The nucleolus begins to fade from view. _____3. A new nuclear membrane is forming. _____4. The cell membrane begins to pinch in. _____5. The chromosomes de-condense. _____6. The chromosomes are located at the equator. _____7. The nuclear membrane begins to fade from view. _____8. The chromosomes move towards the poles of the cell. _____9. Sister chromatids line up along the equator. _____10. The division (cleavage) furrow appears _____11. The spindle is formed. _____12. Chromosomes are not visible. _____13. The cell plate begins to be built. _____14. Chromosomes replicated. _____15. The reverse of prophase.1) What phase of mitosis is this? Answer: 2) What is the indicated structure 1? select one. a. chromosome b. chromosome with two sister chromatids c. centrioles/centrosome d. spindle fibres e. metaphase plate 3)If the diploid (2n) number of this cell is 8 how many chromosomes are present? 4) If the diploid (2n) number of this cell is 8 how many sister chromatids are present? 5) If the diploid (2n) number of this cell is 8 how many homologous pairs are present?Match the following events with the stages in mitosis: chromosomal materials condenses to form compact chromosomes. alignment of chromosomes along the equator or plate with microtubules attached to poles sister chromatids for each chromosome split and move to opposite poles chromosomes are clustered at each of the poles and give way to cytokinesis A. telophase B. anaphase C. metaphase D. prophase