Download Extension Exercise 1 – Cracking the Code

EDUCATION PACKAGE
HUMAN GENETICS IN PRIMARY SCIENCE
WORKSHEET 12: YEAR 6 S TAGE 3
Extension Exercise 1 – Cracking the Code
Chromosomes are made of long chains of a chemical called
.
DNA is made from four building blocks called
.
These bases have special names which are:
A C G T -
cytosine – bases –
thymine – DNA –
guanine - adenine
THE CENTRE FOR GENETICS EDUCATION 2007
A DAPTED FROM THE MCRI’S GOALS FOR GENES PROJECT 1999
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EDUCATION PACKAGE
HUMAN GENETICS IN PRIMARY SCIENCE
WORKSHEET 13 P AGE 1: YEAR 6 S TAGE 3
Extension Exercise 2 – Finding our Genes
Cut out the squares and paste them onto the following
sheet in order from largest objects to smallest objects.
A
C
A
T
–
–
–
–
T
G
T
A
Inside each cell
we have 23 pairs
of chromosomes
A chromosome
looks like this
One gene is a
combination of
chemicals called
bases
This is called a
strand of DNA –
if you unravel a
chromosome it looks
like this
Every person is
made up of
millions of cells
THE CENTRE FOR GENETICS EDUCATION 2007
A DAPTED FROM THE MCRI’S GOALS FOR GENES PROJECT 1999
Chemical
combinations along
the DNA strand are
called genes
14
EDUCATION PACKAGE
HUMAN GENETICS IN PRIMARY SCIENCE
WORKSHEET 13 (PAGE 2): Y EAR 6 S TAGE 3
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§
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Every person is made up of millions of cells. Inside each cell we
have 23 pairs of chromosomes.
A chromosome looks like a ball of wool. If you unravel a
chromosome you get a strand of DNA.
Genes are located along the strand. One gene is a combination of
chemicals, called bases.
largest
smallest
Amazing Fact: DNA stands for Deoxyribonucleic Acid (dee-ocksierye-bow-new-clay-ick acid) and is really made up of 4 chemicals.
THE CENTRE FOR GENETICS EDUCATION 2007
A DAPTED FROM THE MCRI’S GOALS FOR GENES PROJECT 1999
15