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Growth and Division of the Cell (Division Phase of the Cell Cycle (meiosis…
Growth and Division of the Cell
Growth Phase of the Cell Cycle
G2 phase
cells prepare for division
S phase
genes are replicated
genome
complex of genes
gene amplification
some genes are replicated
endoreduplication
80% of maturing plants
nucleus twice as large
G1 phase
synthesis of nucleotides
Division Phase of the Cell Cycle
meiosis
reproductive cells
reduction division
meiosis I
leptotene
chromosomes condense
zyotene
pairing of chromosomes
bivalent
synapsed pair of homologous chromosomes
cytokinesis
division of cytoplasm
preprophase band
plane of division
phragmoplast
short microtubles
meiosis II
coenocyte
hundreds or thousands of nuclei
mitosis
duplication division
Cell Division in Algae
nuclei
same in plants and animals
cytokinesis
similar to plants
green algae
mitotic spindle depolymerizes quickly
