Mitosis & Meiosis

The division of the mother cell into two daughter cells, genetically identical to each other and to their parent cell

Interphase (G₁),S=DNA replication, Late interphase (G₂), Prophase, Metaphase, Anaphase, Telophase, Cytokenesis

G₁ (1_st growth) 1 centriol Choromotids Cells spend most of life in this phase

G₂ (2_nd growth) 2 centriols Sister chromatids Cells spend most of life in this phase

Spindle fibers form Nuclear envelope breaks down

Chromosomes line up in center along the metaphase plate Spindle fibers are attached

Spindle fibers begin to shorten, pulling chromotids appart.

Cleavage furrow forms Chromotids pull to opposite ends Nuclear envelope begins to form

Cytoplasim divides & cell membrane pinches into 2 seperate cells Exact copies of cell we began with

The process by which a single parent diploid cell (Both homologous chromosomes) divides to produce four daughter haploids cells (One homologous chromosome of the pair). Meiosis is the type of cell division by which germ cells (eggs and sperm) are produced.

Interphase (G₁₎, S= DNA replication, Late Interfase (G₂), Prophase I, Metaphase I, Anaphase I, Telophase I & Cytokenesis, Prophase II, Metaphase II, Anaphase II, Telophase II & Cytokenesis

G₁ (1_st growth) 1 centriol Choromotids

G₂ (2_nd growth) 2 centriols Sister chromatids

1) Nucleur envelope breaks down 2) Spindles form 3) Tetrad formation(paired homologus chromosomes w/ a total of 4 chromotids- crosses ea. other) 4) Homologus chromosomes are corrosponding maternal & parternal chromosomes 5) Crossing over during tetrad formation = genetic exchange @ the chiasmata (physical site they touch)

Chromosomes line up in center along metaphase plate Spindle fibers are attached