Chromosomes l Diploid contains 2 sets of chromosomes

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Chromosomes l Diploid: contains 2 sets of chromosomes ¡Body cells, 2 n l Haploid:

Chromosomes l Diploid: contains 2 sets of chromosomes ¡Body cells, 2 n l Haploid: contains 1 set of chromosomes ¡Gametes, sex cells, n Sister chromatids- 2 identical chromatids held together by a centromere Kinetochores: protein complex that develops on either side of centromere.

Phases of Mitosis l Prophase ¡ Centrosomes have duplicated ¡ Chromatin condenses into chromosomes

Phases of Mitosis l Prophase ¡ Centrosomes have duplicated ¡ Chromatin condenses into chromosomes ¡ Spindles forming ¡ Nucleolus and nuclear envelope disappear l Metaphase ¡ Centromeres/chromosomes aligned along middle ¡ Spindles attach to kinetochore l Anaphase ¡ Sister chromatids are pulled apart and daughter chromosomes move toward opposite poles. ¡ Cleavage furrow begins to form l Telophase ¡ Nuclear envelope and nucleolus reappear. ¡ Chromosomes begin to uncoil

cytokinesis l Division of the cytoplasm l Animal cell ¡Cleavage furrow forms ¡Band of

cytokinesis l Division of the cytoplasm l Animal cell ¡Cleavage furrow forms ¡Band of actin filaments (contractile ring), forms a circular constriction l Plant cell ¡Golgi apparatus forms vesicles which move along the microtubules to the region of a small disk seen between the 3 daughter plant cells ¡Cell plate (newly formed plasma membrane) forms between the daughter cells

l. Mitosis Power Point Quiz

l. Mitosis Power Point Quiz

Interphase

Interphase

Prophase

Prophase

Metaphase

Metaphase

Anaphase

Anaphase

cytokinesis

cytokinesis

l Chromosomes align along the middle

l Chromosomes align along the middle

l Spindle fibers form

l Spindle fibers form

l Nuclear envelope appears

l Nuclear envelope appears

l Chromosomes appear

l Chromosomes appear

l Chromosomes uncoil

l Chromosomes uncoil

l Chromosomes move to opposite poles

l Chromosomes move to opposite poles

l Growth and preparation for division

l Growth and preparation for division

l Centromeres divide

l Centromeres divide