--> -->

AP Notes, Outlines, Study Guides, Vocabulary, Practice Exams and more!

AP Biology Chapter 12 Flashcards

Terms : Hide Images
8457605803anaphasefourth stage of mitosis, in which the chromatids of each chromosome have separated and the daughter chromosomes are moving to the poles of the cell0
8457605804anchorage dependencethe requirement that to divide, a cell must be attached to the substratum1
8457605805benign tumora mass of abnormal cells that remains at the site of origin2
8457605806binary fissionthe type of cell division by which prokaryotes reproduce; each dividing daughter cell receives a copy of the single parental chromosome3
8457605807cell cyclean ordered sequence of events in the life of a eukaryotic cell, from its origin in the division of a parent cell until its own division into two; composed of M, G1, S, G24
8457605808cell cycle control systema cyclically operating set of molecules in the cell that triggers and coordinates key events in the cell cycle5
8457605809cell divisionreproduction of a cell6
8457605810cell platea double membrane across the midline of a dividing plant cell, between which the new cell wall form during cytokinesis7
8457605811centromerethe centralized region joining two chromatids8
8457605812centrosomematerial present in the cytoplasm of all eukaryotic cells, important during cell division; the microtubule organizing center9
8457605813checkpointa critical control point in the cell cycle where stop and go-ahead signals regulate the cycle10
8457605814chromatincomplex of DNA and proteins that makes up a eukaryotic chromosome; when a cell is not diving chromatin exists as a mass of very long, thin fibers that are not visible with a light microscope11
8457605815chromosomea threadlike, gene-carrying structure found in the nucleus; each chromosome consists of one very long DNA molecule and associated proteins12
8457605816cleavage furrowthe first sign of cleavage in an animal cell;a shallow groove in the cell surface near the old metaphase plate13
8457605817cyclina regulatory protein whose concentration fluctuates cyclically14
8457605818cytokinesisthe division of the cytoplasm to form two separate daughter cells immediately following mitosis15
8457605819density-dependent inhibitionthe phenomenon observed in normal animal cells that causes them to stop dividing when they come into contact with one another16
8457605820G0 phasea nondividing state in which a cell has left the cell cycle17
8457605821G1 phaseThe first gap, or growth phase, of the cell cycle, consisting of the portion of interphase before DNA synthesis begins.18
8457605822G2 phasethe second growth phase of the cell cycle, consisting of the portion of interphase after DNA synthesis occur19
8457605823gametea haploid cell, such as an egg or sperm. Gametes unite during sexual reproduction to form a diploid cell20
8457605824genomethe complete set of genes or genetic material present in a cell or organism.21
8457605825interphasethe period in the cell cycle when the cell is not dividing. During interphase, cellular metabolic activity is high, chromosomes and organelles are duplicated, and cell size may increase. 90% of the cell cycle22
8457605826M phasemitotic phase; the phase of the cell cycle that includes mitosis and cytokinesis23
8457605827malignant tumora cancerous tumor that is invasive enough to impair the functions of one or more organs24
8457605828metaphasethe third stage of mitosis, in which the spindle is complete and the chromosomes, attached to the microtubules at their kinetochores, are all aligned at the metaphase plate25
8457605829metastasisthe spread of cancer cells to locations distant from their original site26
8457605830mitosisa process of nuclear division in eukaryotic cells conventionally divided into 5 stages; prophase, prometaphase, metaphase, anaphase, and telophase. Mitosis conserves chromosome number by equally allocating replicated chromosomes to each of the daughter nuclei27
8457605831mitotic (M) phasethe phase of the cell cycle that includes mitosis and cytokinesis28
8457605832mitotic spindlean assemblage of microtubules and associated proteins that is involved in the movements of chromosomes during mitosis29
8457605833MPFmaturation-promoting factor (M-phase promoting factor); a protein complex required for a cell to progress from late interphase to mitosis. The active form consists of cyclin and a protein kinase30
8457605834prophasethe first stage of mitosis, in which the chromatin is condensing and the mitotic spindle begin to form, but the nucleu and nucleolus are still intact31
8457605835S phasethe synthesis phase of the cell cycle; the portion of interphase during which DNA is replicated32
8457605836sister chromatidsreplicated forms of chromosomes joined together by the centromere and eventually separating during mitosis or meiosis II33
8457605837somatic cellany cell in multicellular organisms except a sperm or egg cell34
8457605838telophasethe fifth and final stage of mitosis, in which daughter cells are forming and cytokinesis has typically begun35

Need Help?

We hope your visit has been a productive one. If you're having any problems, or would like to give some feedback, we'd love to hear from you.

For general help, questions, and suggestions, try our dedicated support forums.

If you need to contact the Course-Notes.Org web experience team, please use our contact form.

Need Notes?

While we strive to provide the most comprehensive notes for as many high school textbooks as possible, there are certainly going to be some that we miss. Drop us a note and let us know which textbooks you need. Be sure to include which edition of the textbook you are using! If we see enough demand, we'll do whatever we can to get those notes up on the site for you!

-->