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36 terms

Biology 1 Chapter 10

Biology chapter 10
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mitosis
cell division in which the nucleus divides into nuclei containing the same number of chromosomes
spindle fibers
help pull apart the cell during replication and are made up of micrtubules
centrosomes
the two poles of the cell, the place where spindle fibers grow from.
centrioles
does something with spindle fibers.
interphase
cell grows
prophase
first and longest phase of mitosis, during which the chromosomes become visible and the centrioles separate and take up positions on the opposite sides of the nucleus
metaphase
second phase of mitosis, during which the chromosomes line up across the center of the cell
anaphase
the 3rd stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
telophase
The final stage of mitosis or meiosis, during which a nuclear membrane forms around each set of new chromosomes
What are the phases of Mitosis
Interphase
Prophase
Metaphas
Anaphase
Telophase
What happens during telophase
cytokinesis-splitting of cytoplasm
mitosis splitting of nuclus
Stages of interphase
G1
S
G2
DNA
Deoxyribosenucleic acid-forms the genetic material of all cells. Double helix structure
What structure is DNA
Double helix
Cell Nuclease has ____ chromosomes
23 pairs
What are the different forms of DNA
Chromatin
Chromosome
Chromatid
Centromere
Kinetochore
chromatin
combination of DNA and protein
Most common form of DNA
can't be seen
Blueprints that are read
Chromosome
visible form of DNA
Blueprint is NOT read
Chromotin is tightly coiled
chromatid
1/2 of duplciated chromosome
2 chromatids attached at a centromere
Called sister chromatids
centromere
where sister chromoatids are joined
holds the kinetochore
kinetochore
protein in center of centromere and connected to microtubles to transport chromosome to opposite end of cell
Cell cycle is divided in ___ parts
2 Interphase and miotic phase
G1 phase
cell grows
normal metabolic roles
S phase
Synthesis
genetic material duplicates
G2 phase
DNA is loose chromotin but ready to go
Miotic phase contains
Prophase
Metaphase
Anaphase
Telophase
Miotic phase
cycle when a cell begins to divide
Mitosis
duplicated DNA seperates and moves to opposite sides-create 2 daughter nuclei
Cytokinesis
cytoplasm splits into 2 (makes identical daughter cells)
asexual reproduction
reproduction that does not involve the union of gametes and in which a single parent produces offspring that are genetically identical to the parent
sexual reproduction
process in which genetic material from two parents combines and produces offspring that differ genetically from either parent
chromosomes
thread like structures that have genetic info that is passed down from one generation to the next
prokaryotic
describes a cell that does not have a nucleus or anyother membrane-covered organelles; also called bacteria.
eukaryotic
contains a nucleues , plasama membrane
cytokineses in plant cell
cell membrane not flexible-creates a cell plate for division
cytokinesis in animals
cytoplasm pinches in 1/2 and separates