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Chapter 9.1-9.3 Vocabulary
Chapter 9.1, 9.2, and 9.3 Vocab Words
18
Biology
9th Grade
11/06/2008

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Term
Asexual Reproduction
Definition
Process in which a single cell or set of cells produces offspring that inherit all their genetic materical from one parent
Term
Sexual Reproduction
Definition
process in which genetic material from two parents combines and produces offspring that differ genetically from either parent
Term
Chromatin
Definition
combination of DNA and protein molecules, in the form of long, thin fibers, making up the genetic material in the nucleus of a eukaryotic cell
Term
Chromosome
Definition
condensed threads of genetic material formed from chromatin as a cell prepares to divide
Term
sister chromatid
Definition
one of a pair of identical chromosomes created before a cell divides
Term
centromere
Definition
region where two sister chromatids are joined tightly together
Term
Cell Cycle
Definition
sequence of events from the production of a eukaryotic cell to the time the cell itself reproduces
Term
interphase
Definition
stage of the cell cycle during which a cell carries out its metabolic processes and performs its functions in the body
Term
mitotic phase
Definition
stage of the cell cycle when a cell is actively dividing
Term
Mitosis
Definition
process by which the nucleus and duplicated chromosomes of a cell divide and are evenly distributed, forming two daughter nuclei
Term
cytokinesis
Definition
process by which the cytoplasm of a cell is divided in two; usually follows mitosis and meiosis
Term
Spindle
Definition
framework of microtubules that guide the movement of chromosomes during mitosis and meiosis
Term
centrosome
Definition
region of cytoplasmic material that in animal cells contains structures called centrioles
Term
Prophase
Definition
first stage of mitosis and of meiosis I and II, when the already replicated chromosomes condense
Term
metaphase
Definition
second stage of mitosis and of meiosis I and II when the spindle is fully formed and all of the chromosomes are held in place
Term
anaphase
Definition
third phase of mitosis and of meiosis I and II, in which the sister chromatids separate and move toward the poles of the spindle
Term
telophase
Definition
final stage of mitosis and of meiosis I and II, in which the chromosomes reach the spindle poles, nuclear envelopes form around each set of daughter chromosomes, and the nucleoli reappear
Term
Cell plate
Definition
disk containing cell wall material that develops in plant cells during cytokinesis, eventually dividing the cell into two daughter cells
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