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Cell Replication (Meiosis (Purpose: To make gametes (Sperm (4) Egg (1)…
Cell Replication
Meiosis
Purpose: To make gametes
Sperm (4) Egg (1)
Egg are larger than sperm
Haploid cells
New cells have 23 chromosomes
4 cells created
Two daughter cells
Occurs TWICE
Aging= slowed down Meiosis
Sexual
Mitosis
Purpose: To make somatic cells
2 identical daughter cells are formed; cells are diploid
Four daughter cells
Uncontrolled mitosis= Cancer
Only occurs ONCE
Asexual
Interphase
Longest phase
Cell increases in size
Copies DNA
NOT a part of Mitosis/Meiosis
Cytokinesis
When the cytoplasm splits in two
NOT part of Mitosis
Spindle Fibers
Mitosis: Pull apart sister chromatids
Meiosis: Pull apart homologous chromosomes in Meiosis sections of the nuclear membrane
Centrioles: Anchor spindle fibers
Plants don't have centrioles
Prophase
Mitosis: Sister chromatids pair up
Meiosis: Homologous chromosomes pair up
Metaphase
Mitosis: Sister chromatids line up in the middle
Meiosis: Homologous chromosomes line up in the middle
Anaphase
Mitosis: Sister chromatids pull apart
Meiosis: Homologous chromosomes pull apart
Telophase
Two nuclei formed
Meiosis II is similar to Mitosis I