SimUText - Mitosis

SimUText - Mitosis Guess which of the following life processes involves mitosis? Getting over the flu healing broken bone long-term acclimation to a higher altitude baking bread - ANS - All When does the cell repli ...

SimUText - Mitosis Guess which of the following life processes involves mitosis? Getting over the flu healing broken bone long-term acclimation to a higher altitude baking bread - ANS - All When does the cell replicate its DNA? - ANS - Before Mitosis occurs How are the four replicated chromosomes in the parent cell shared between the two daughter cells? - ANS - Each daughter cell receives half of each replicated chromosome Which pair of daughter cells (A,B, or C) would be produced by mitosis? - ANS - C Which is the correct order of events in mitosis? - ANS - Condense DNA, dissolve nuclear envelope, separate sister chromatids, cytokinesis In the simulation, why is it Necessary to physically separate sister chromatids with your mouse so that they're on opposite sides of the cell? - ANS - If sister chromatids aren't on opposite sides of the cell, the daughter cells could end up with very different DNA Try the simulation without dissolving the nuclear envelope. One other mitosis event does not occur properly. Which is it? - ANS - Moving sister chromatids to opposite sides of the cell Which of the following occurs in plant cells but NOT animal cells during mitosis? - ANS - The cell wall is constructed during cytokinesis Human cells have 46 condensed chromosomes at the start of mitosis. How many sister chromatids are passed on to each daughter cell? - ANS - 46 Human cells have 46 condensed chromosomes at the start of mitosis. How many DNA molecules are in a cell at the start of mitosis? - ANS - 92 Which of the following statements is TRUE? All chromosomes have equivalent DNA to all other chromosomes All sister chromatids have equivalent DNA to all other sister chromatids Chromosomes condense after the nuclear envelope dissolves Each chromosome is composed of two sister chromatids that have equivalent DNA - ANS - Each chromosome is composed of two sister chromatids that have equivalent DNA Which of the following occur during mitosis? Replication of the cell's DNA Substantial cell growth Division of the cell into two daughter cells with equivalent DNA DNA coils into condensed chromosomes - ANS - Division of the cell into two daughter cells with equivalent DNA DNA coils into condensed chromosomes In which phase is the nuclear envelope ABSENT? Prophase Prometaphase Metaphase Anaphase Telophase - ANS - Prometaphase Metaphase Anaphase Telophase DNA is in its condensed form during every phase of mitosis. True False - ANS - True In which phases are the condensed chromosomes or sister chromatids attached to the spindle? Prophase Prometaphase Metaphase Anaphase Telophase - ANS - Prometaphase Metaphase Anaphase Telophase When are the chromosomes aligned at the midline of the cell? - ANS - Beginning of metaphase, through the start of anaphase To how many spindle poles is each condensed chromosome attached in metaphase? - ANS - 2 What would happen if the spindle stopped working during anaphase? - ANS - Sister chromatids would not move Why does the nuclear envelope dissolve during mitosis? The nuclear envelope is a barrier between the spindle and the chromosomes The nuclear envelope would block movement of the chromosomes, especially during anaphase and telophase The spindle could not form with the nuclear envelope present - ANS - The nuclear envelope is a barrier between the spindle and the chromosomes The nuclear envelope would block movement of the chromosomes, especially during anaphase and telophase A micro tube grabs a chromosome when any part of it touches the chromosome. True False - ANS - False Based on this simulation, what choice below best explains why there are so many microtubules for each spindle pole? - ANS - More microtubules moving through the cell means that chromosomes are grabbed more quickly In the simulation, do microtubules attach to random locations on the condensed chromosomes? - ANS - No, a microtubule only attaches to the center of a chromosome In which way does the spindle move attached to the chromosomes? - ANS - The spindle pulls chromosomes toward a spindle pole center Why do chromosomes move to the midline when attached to both spindle poles? - ANS - The chromosome is pulled toward both spindle poles in a tug-of-war Microtubules remain attached to a chromosome when: - ANS - The chromosome is attached to both spindle poles Based on your answer to the last question, which condition below is a possible signal for a microtubule to remain attached to a kinetochore? - ANS - Something tugs the chromosome in the opposite direction