Cell Division Mitosis YouTube Lecture Handouts

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Cell Division Mitosis YouTube Lecture Handouts

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Mitosis & Amitosis

Cell Division Mitosis And Amitosis of Image - 1

Cell Division Mitosis and Amitosis of Image - 1

Cell Division Mitosis And Amitosis of Image - 1

Amitosis

  • Direct cell division

  • By Remak & explained by Flemming

  • No chr. differentiation & spindle

  • Nuclei elongate, constrict & forms two daughter cells

  • Common in diseased cells

  • E.g., Monera

  • Others are indirect cell division

Showing cells dividing in mitosis

Showing Cells Dividing in Mitosis

Showing cells dividing in mitosis

Mitosis

  • Direct cell division

  • By Remak & explained by Flemming

  • No chr. differentiation & spindle

  • Nuclei elongate, constrict & forms two daughter cells

  • Common in diseased cells

  • E.g., Monera

  • Others are indirect cell division

Cell Division Mitosis Image - 3

Cell Division Mitosis Image - 3

Cell Division Mitosis Image - 3

Cell Division Plant Mitosis And Animal Mitosis Table - 1
Cell Division Plant Mitosis And Animal Mitosis Table - 1

Plant Mitosis

Animal Mitosis

In meristem

In many places

By cytokinin

By lymphokines, epidermal growth factors

No change in shape

Becomes spherical

Spindle – An astral

Spindle - Amphiastral

Centriole is absent

Spindle pole possess centriole

Equatorial region forms phragmoplast

Equatorial region forms midbody

Cytokinesis by cell plate

By cleavage

Cell plate grow centrifugally

Grows centripetally

Microfilament not important

Important role

Cell plate cements daughter cells

Cleavage creates intracellular space between daughter cells

Significance of Mitosis

  • Growth

  • Maintenance of surface-volume ratio

  • Maintenance of chromosome number

  • Regeneration

  • Reproduction and repair

  • Differentiation

  • Cancer – uncontrolled mitotic division