A cell has 38 chromosomes. After mitosis and cell division, one daughter cell has 39 chromosomes and the other has 37. What might have caused these abnormal chromosome numbers? What effects do you suppose this might have on cell function? Why?

Compare Mitosis and Meiosis after watching these videos: Cell Cycle, Mitosis and Meiosis https://www.khanacademy.org/science/high-school-biology/hs-reproduction-and-cell-division/hs-the-cell-cycle-and-mitosis/v/mitosis   Mitosis (video) | The cell cycle and mitosis | Khan Academy Mitosis is how cells divide! Learn what happens in all the phases of mitosis: prophase, metaphase, anaphase, and telophase. www.khanacademy.org https://www.khanacademy.org/science/high-school-biology/hs-reproduction-and-cell-division/hs-meiosis/v/phases-of-meiosis-i   Phases of meiosis I (video) | Meiosis | Khan Academy How homologous chromosomes separate into two sets. Prophase I, metaphase I, anaphase I, and telophase I. www.khanacademy.org https://www.khanacademy.org/science/biology/cellular-molecular-biology/meiosis/v/comparing-mitosis-and-meiosis?modal=1 Comparison Mitosis vs. Meiosis: Side by Side Comparison Mitosis vs Meiosis

During the cell cycle there are three checkpoints. Match each description with the correct checkpoint.                                                                        Requires growth signals and checks there are no mutation in the DNA                                                                        Checks that DNA is properly replicated and that all the organelles and proteins needed for division are present                                                                         Ensures that all the chromosomes are lined up and accounted for A. G1/S B. S/G2 C. G2/M  D. Metaphase/Anaphase E. Anaphase/Telophase

What celluar events/processes are associated with G1,S,G2,and M phases of the cell cycle? With the phases of mitosis? Some example: A. DNA replication B. Beginning of mitosis C. Normal cell growth and function D. Breaksdown of nuclear membrane E.Separation of sister chromatids F.Alignment of chromosomes on the equator of the cell H.Triggering the compaction and condensation of chromosomes I. Attachment of microtubles to kinetochores

Which statement is true regarding mitosis?1.During prophase, the chromosomes become uncondensed and two new nuclei are formed.2.During telophase, the chromosomes align in the center of the cell.3.During metaphase, the chromosomes condense4.During anaphase, the chromatids separate and move to opposite poles.

If the most basic function of the cell cycle is to accurately duplicate the DNA in the chromosomes and distribute the copies precisely to the daughter cells, why are there gaps between S-phase and M-phase?

In which stage(s) of the cell cycle, mitosis or meiosis  do each of these processes occur (multiple stages apply to some) Crossing-over:  Chromosome supercoiling:  Separation of sister chromatids:  DNA synthesis:  Chromosome reduction from 2N to N:    4. A previously undiscovered single celled organism was found living at a great depth on the ocean floor. Its nucleus contains only a single, linear chromosome consisting of  7x10^6 nucleotide pairs of DNA coalesced with three types of histone-like proteins. The analysis of individual nucleosomes revealed that each unit contained one copy of each protein and that the short linker DNA had no protein bound to it If the entire chromosome consists of nucleosomes (discounting any linker DNA), how many are there and how many total proteins are needed to form them?

Why do eukaryotic cells need to go through the elaborate procedure of mitosis rather than simply dividing during interphase? Select as many answers as apply. 1.Daughter cells must be genetically identical to the mother cell, for homeostasis and ordered tissue growth.  2.Bivalent chromosomes must condense and be separated in an orderly fashion, to allow equal distribution of copies into daughter cells 3.Physically dividing the nucleus during interphase would likely lead to gross chromosome breakage and highly unequal assortment of genetic information into daughter cells. 4.Dividing the nucleus during interphase would have the same outcome as mitosis 5.Daughter cells must have half the number of chromosomes after mitosis than the mother cells 6.The homologous pairs of chromosomes need to be separated, to ensure copies go to the daughter cells.