Download mitosis - E

Source : Genetics Home Reference
Source :http://publications.nigms.nih.gov/thenewgenetics/chapter1.html#c1
http://www.yourgenome.org/teachers/origami.shtml
WALT know what DNA is
DNA stands for deoxyribonucleic acid.
What is DNA made of?
DNA is made up of nucleotides.
Four types of nucleotides:
A- adenine
T- thymine
C - cytosine
G – guanine
Nucleotides are held together by a
backbone made of phosphate and
deoxyribose.
The nucleotides are sometimes referred
to as "bases".
The double helix structure was
discovered by Watson and Crick in 1953.
kinetochore
Source :http://y12hb.wordpress.com/
Source : newscenter.lbl.gov
Cell Cycle
Homework : Explain what is apoptosis?
The genetic purpose of mitosis is to produce
two daughter cells that are genetically
identical to the parent cell.
Reasons for mitosis – reproduction and
replacement of cells. Problems with this
process can seriously damage or kill cells.
Using
onion
root
cells
to
view
mitosis
Viewing mitosis in onion root tips!
region of cell elongation
region of cell division
protective root cap
Viewing mitosis in onion root tips!
Why use onion roots?
• easy to grow in large numbers
• cells at the tip actively dividing
• cells are in stages of mitosis
• chromosomes can be stained to make
them more easily observable
Make a squash preparation
Take a closer look!
What is mitosis?
Interphase
Prophase
Metaphase
Stages of cell cycle : I Pray Mainly At The Church!
Anaphase
Telophase
Cytokinesis
Stages in mitosis :
Prophase, Metaphase, Anaphase and
Telophase