The Cell Cycle and Mitosis lab

MITOSIS LAB Allium root tip cells

MITOSIS LAB

Unwinding DNA

Every nucleated cell in your body has 46 chromosomes

A Chromosome

Replication: Centrioles replicate A single-stranded chromosome replicates into a double-stranded chromosome Double-stranded chromosomes are joined by centromeres

http://www.umanitoba.ca/Biology/lab3/biolab3_5.html

Allium Root tip Why are we looking in this region?

Allium Root tip

Allium Root tip

(A) Interphase Not a part of mitosis The cell grows, replicates DNA and prepares for Mitosis

Replication:

(B) Prophase Centrioles replicate A single-stranded chromosome replicates into a double-stranded chromosome Double-stranded chromosomes are joined by centromeres Centrioles migrate to opposite ends or poles of the cell forming spindle fibers

(C) Metaphase

The double-stranded chromosomes line up in the middle of the cell. (C) Metaphase The double-stranded chromosomes line up in the middle of the cell.

The double-stranded chromosomes break at the centromere. (D) Anaphase The double-stranded chromosomes break at the centromere. The daughter chromosomes then move apart to opposite poles with the aid of spindle fibers

(E) Telophase Last phase of mitosis Begins when chromosomes reach the poles A nuclear membrane forms Cytokinesis (cytoplasmic division) Cell “pinches in” Results in 2 exact daughter cells

Citations and Special thanks First published Oct 98: Modified Aug 05 Copyright © Michael Shaw 2005 (Images and Text) Joe Saccone Eastchester NY, If you feel that your information was not sited please contact me and I will update my cite.

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Plant Mitosis -- Review Your body is made up of trillions of cells. In some ways, your cells can be very different from each other. For example, they can specialize in a particular function, such as carrying oxygen (red blood cells), absorbing food (intestinal cells),or sensing light (cells in your eyes). In                                                          See a larger view                                                                                                         Your body is made up of trillions of cells. In some ways, your cells can be very different from each other. For example, they can specialize in a particular function, such as carrying oxygen (red blood cells), absorbing food (intestinal cells),or sensing light (cells in your eyes). In                                                          See a larger view                                                                                                                                                             Plant Mitosis -- Review Interphase                                Prophase                                Metaphase                                Anaphase                                Telophase