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7th Grade Science: Cells - Sections 2-3 cell cycle and 2-4 cell control

Cell Division / Mitosis Vocabulary: gene, cell division, chromosomes, somatic cells, gametes, chromatin, sister chromatids, centromere, mitosis, cytokinesis, meiosis, mitotic phase, interphase, centrosome, aster, kinetochore, cleavage furrow, cell plate, mitotic spindle, binary fission, transformation, benign tumor, malignant tumor, metastasis Objectives: After attending lectures and studying the chapter, the student should be able to: 1. Define gene as it relates to the genetic material in a ce…
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Cell Cycle
An ordered sequence of events in the life of a cell
interphase
The period in the cell cycle when the cell is not dividing. Interphase often accounts for about 90% of the cell cycle.
Mitosis
A process of nuclear division in eukaryotic cells conventionally divided into 4 stages: prophase, metaphase, anaphase, and telophase.
What are the 4 phases of mitosis?
PMAT
Prophase
Metaphase
Anaphase
Telophase
Prophase
The first stage of mitosis, in which 3 things happen: 1) chromatin condenses into chromosomes 2) Nuclear envelope breaks down 3) mitotic spindle fibers are assembled.
Metaphase
The 2nd stage of mitosis, in which the spindle is complete and the chromosomes, attached to microtubules at their kinetochores, are all aligned at the metaphase plate.
Anaphase
The 3rd stage of mitosis, in which the chromatids of each chromosome have separated and the chromosomes are moving to the poles of the cell.
Telophase
The 4th and final stage of mitosis, in which daughter nuclei are forming and cytokinesis has typically begun.
chromosomes
A cellular structure carrying genetic material, found in the nucleus of eukaryotic cells. Each chromosome consists of one very long DNA molecule and associated proteins
Cytokinesis
The division of the cytoplasm to form two separate daughter cells immediately after mitosis.
centromere
In a duplicated chromosome, the region on each sister chromatid where they are most closely attached to each other by proteins that bind to specific DNA sequences; this close attachment causes a constriction in the condensed chromosome. (An uncondensed, unduplicated chromosome has a single centromere, identified by its DNA sequence.)
mitosis
Cell division that generates new cells for growth and repair. The division of one cell into two genetically identical daughter cells
cancer
Disorder in which some of the body's cells lose the ability to control growth
mutation
A change in a gene or chromosome.
tumor
Mass of rapidly dividing cells that can damage surrounding tissue
chemotherapy
The use of drugs to treat diseases such as cancer
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