Which of the following cell cycle checkpoints ensures that cells do not enter anaphase until all chromosomes are properly bioriented by attachment to opposite MTOCs Intra S- phase checkpoint DNA damage checkpoint Spindle assembly checkpoint Spindle position checkpoint

Which checkpoint mechanism is likely activated by the chemical compound to delay entry into mitosis?*1 pointG2 checkpointM checkpointS checkpointG1 checkpoint20. A researcher is studying a population of cells that exhibit abnormal chromosome numbers. Which of the following scenarios is most likely to explain this observation?*1 pointMutations in genes encoding proteins involved in cell cycle checkpoints occurred.Errors during DNA replication led to mutations in key cell cycle regulatory genes.Environmental toxins disrupted spindle fiber formation during mitosis.Various genetic and environmental factors may contribute to the observed abnormal chromosome numbers in the cell population.

The stage of mitosis in which chromosomes line up in the middle of the cell.Group of answer choicesprophasetelophasecytokinesesinterphaseanaphaseM phasemetaphaseNext

At which of the following checkpoints will the cell cycle stop if DNA damage is detected?  Spindle checkpoint during S phase   G2 checkpoint between S and G2 phases The G2 checkpoint does check for DNA damage (due to faulty DNA replication), but it is located between G2 phase of interphase and the beginning of M (mitotic) phase. Try again.  G1 checkpoint between G1 and S phases   Mitosis checkpoint during M phase

Anaphase II is essentially the same as mitotic anaphase except that in anaphase II ________ and in mitotic anaphase ________.the cells are haploid and sister chromatids separate; the cells have the same number of chromosomes as the original cell and sister chromatids separatecrossing over occurs; crossing over does not occurchromosomes line up double file in the middle of the cell; chromosomes line up single file in the middle of the cellthe cells are diploid; the cells are haploid

Name the stage of mitosis where the chromosomes all line up in the middle of the cell. AnaphaseTelophaseMetaphaseProphaseI'm not sure