Mitosis Flashcards
uncoiled DNA strands
Chromatin
DNA- containing structure that carries genetic material from one generation to another (supercoiled)
Chromosome
Stage of a cell cycle during which the cell’s cytoplasm divides, creating two daughter cells
cytokinesis
stage of the cell cycle during which a cell grows, matures, and replicates its DNA
Interphase
third stage of mitosis in which sister chromatids are pulled apart and microtubules move the chromosomes to opposite poles of the cells
Anaphase
cell structure that joins two sister chromatids
centromere
stage of mitosis in which motor proteins move sister chromatids to the cell’s equator
Metaphase
the first stage of mitosis, during which the cell’s chromatin condenses into chromosomes.
Prophase
the structure that contains identical DNA copies and is formed during DNA replication
Sister chromatid
last stage of mitosis in which nucleoli reappear. Two new nuclear membranes begin to form, but the cell has not yet completely divided.
Telophase
in interphase - the cell grows rapidly ad performs regular cell functions.
Growth 1 (G1)
The “synthesis” phase of the cell cycle; is the portion of the interphase during which DNA is replicated. (doubles each chromosome)
S phase
Enzymes made to prepare for Mitosis
Growth 2 (G2)
- the chromosomes condense and become visible
- nuclear envelope disappears.
- centrioles move to opposite poles.
- Spindle fibers form
Prophase
- Second phase of mitosis, during which the chromosomes line up across the center of the cell.
- Spinde attach to the sister chromatids from opposite poles
Metaphase
- Third phase of mitosis in which sister chromatids are pulled to the opposite side of the cell.
- Spindle fibers shorten
Anaphase
- Chromosomes unwind
- Spindle fibers disappear
- Nuclear envelope reappears
- Cleavage furrow or cell plate is present.
Telophase
Bodies of tightly coiled chromatin; are visible during cell division. Two chromatids bound at a centromere, make a CHROMOSOME.
Chromatids
Special strands of microtubules which grow out of the centrioles, connect to chromosomes at te centromeres and pull them apart during (the anaphase) of mitosis.
Spindle Fibers
what does cell reproduction accomplish?
replaces damaged or lost cells; allows for growth
what is a chromosome?
DNA and (histone) protein coiled into thick filaments visible when cell divides in mitosis.
General cell division in Eukaryotic cells
Mitosis
The number of chromosomes in a typical human body cell.
46
what is the function of DNA?
genetic instructions for the development and function of living things.