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Mitosis/Meiosis
AP Biology Campbell Chapter 12
35
Biology
12th Grade
11/29/2016

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Term
cell division
Definition
reproduction and growth process of a cell dividing to form daughter cells
Term
genome
Definition
the ordering of genes in a haploid set of chromosomes of a particular organism
Term
binary fission
Definition
asexual production of unicellular organisms where one cell divides into 2 cells of the same size
Term
somatic cell
Definition
any cells of the plant or animal except reproductive cells
Term
chromosomes
Definition
threadlike structures made of DNA molecules that contain the genes
Term
chromatin
Definition
substance of a cell's nucleus that has DNA, RNA, and other proteins
Term
sister chromatids
Definition
identical copies of a chromosome, created during the S subphase of interphase
Term
centromere
Definition
region in chromosome that holds the 2 sister chromatids together during mitosis
Term
centriole
Definition
in animal cells, a cytoplasmic organelle that organizes the mitotic spindle fibers during cell reproduction
Term
cell cycle
Definition
the series of events that cells go through as they grow and divide
Term
mitosis
Definition
cell division of the nucleus and nuclei containing the same number of chromosomes
Term
cytokinesis
Definition
final stage of cell cycle, cell's cytoplasm divides and distribution of organelles into the 2 new cells
Term
interphase
Definition
cell grows, prepares for division, consists of G1, S, and G2 phase
Term
S phase
Definition
synthesis phase of cell cycle, DNA is replicated
Term
G1 Phase
Definition
stage 1 of interphase, cells grow and make new proteins and organelles
Term
G2 Phase
Definition
stage 2 of interphase, requiring organelles and molecules for cell division are produced
Term
prophase
Definition
first and last phase of mitosis, chromosomes become visible and centrioles move towards opposites of nucleus
Term
prometaphase
Definition
second stage of mitosis, discrete chromosomes that have identical sister chromatids appear, nuclear envelope fragments, spindle microtubules attach to kinetochores of chromosomes
Term
metaphase
Definition
duplicated chromosomes line up along the equatorial plate of spindle
Term
anaphase
Definition
third phase of mitosis, chromosome pairs separate and move toward opposite poles
Term
telophase
Definition
final stage of mitosis, separated chromosomes reach opposite poles of the dividing cell and nuclei of daughter cells form around the 2 sets of chromosomes
Term
mitotic spindle
Definition
an assemblage of microtubules and associated proteins that is involved in movements of chromosomes during mitosis
Term
centrosome
Definition
structure in cytoplasm of animal cells, functions as microtubule organizing center, has 2 centrioles
Term
kinetochore microtubles
Definition
connects the centrosome with the kinetochore in the centrosome region of chromosome
Term
kinetochore
Definition
condensed region of each chromosome that appears during mitosis surrounding centromere
Term
nonkinetochore microtubules
Definition
produces elongation of the cell as they slide past each other away from middle of cell
Term
dynein
Definition
a large contractile protein forming the side arms of microtubule doublets
Term
cleavage furrow
Definition
first sign of cleavage in animal cell, a shallow groove in the cell surface near the old metaphase plate
Term
cell plate
Definition
double membrane across midline of a dividing plant cell before the new cell wall forms
Term
density dependent inhibition
Definition
phenomenon in animal cells that causes them to stop dividing when they touch each other
Term
growth factors
Definition
regulatory proteins that ensure that the events of cell division occur in proper sequence and correct rate
Term
cyclin
Definition
cellular protein that occurs in cyclically fluctuating concentration and is importantin regulating cell cycle
Term
Cdk
Definition
cycclin dependent kinases, active only when attached to particular cyclin
Term
MPF
Definition
cyclin-Cdk complex that causes the cell to move from interphase into mitosis
Term
cleavage
Definition
process of cytokinesis in animal cells, pinching of plasma membrane
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