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