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Growth and Division of the Cell ( Growth Phase of the cell cycle -Resting…
Growth and Division of the Cell
Growth Phase of the cell cycle
-Resting Phase or Inter Phase :
G1 Phase
First stage after division
used in DNA replication by synthesis the nucleotides.
Conducting most of normal metabolism
G2 Phase
-Cells prepares for devision
-Spindle microtubules are synthesized
S Phase
Nucleus replicate
Has unique sequence of nucleotides
Genome
: complex gene for an organism
Centromere
Telomere
Chromatid
: Have double chromosome.
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Endoreduplication
: process making gigantic nucleus.
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Gene Replication
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Division Phase of the cell Cycle
Mitosis
Duplication Division
Common type of karyokinesis
Produce nuclei less exact copy of original nucleus
Four Phases of Mitosis
Prophase
chromosome condensation happens
Nuclear encelop breaks into numerous vesicles
attached to rough endoplasmic reticulum
Metaphase
chromosomes gradually become visible and move to metaphase plate
separase is activated at the end of this phase
Anaphase
Begins after cohesion release the centromere
Chromosomes on each side gets closer to the end and pulled together into a compact space.
Telophase
Chromosomes approach the end of the spindle
Nuclear envelop appear
spindle depolymerizes completely and disappears
Cytokinesis
Daughter cells receives some of each type of organelles
each half gets some mitochondria
Meiosis
Two sex cells fuse together, forming a zygote and daughter sells are replicates of the original mother cells
Meiosis I
Prophase I
Metaphase I
Anaphase I
Telophase I
Meiosis II
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preprophase band
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identifies the plane of division
Cell Division in Algea
Nuclei
Nuclei of plants are virtually identical.
Its is complex oragnelle
Cytokinesis
many groups of unicellular algae have no wall
different type of cytokinesis occurs in algae.
Cell Division of Prokaryotes
Link Title
Division of chloroplast and mitochondria
