EDUCATION PACKAGE
HUMAN GENETICS IN PRIMARY SCIENCE
WORKSHEET 8: YEARS 5–6 S TAGE 3
Fill in the Gap
1. We
genes from our Mum and
Dad.
2. Genes which are made up of DNA are packaged in
things called
.
3. Chromosomes are found in every
in our body.
4. Our bodies are made up of
of
cells. These are the
of life.
5. In every cell of our body we have 23
of chromosomes.
6. The two strands of DNA in each cell of your body
twist around each other and look like a twisting,
twirling ladder. This shape is called a
.
double helix – inherit
– chromosomes – cell –
pairs – millions –
building blocks
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 9: YEARS 5-6 S TAGE 3
Take a Closer Look
Each of us is
.
Each person is made of millions of
Inside each cell is one
And in each nucleus there are 46
Along the chromosomes are areas called
.
.
.
.
cells – chromosomes
– unique – nucleus genes
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 10: YEARS 5-6 S TAGE 3
Boy or Girl?
Below are the nuclei of two cells. One is from a boy and
the other is from a girl. Can you sort out which is which?
q Here’s a hint how…
§ Look for the two number 1 chromosomes in a cell and
colour them in the same
§ Then go on to 2, 3 and so on, up to 22
§ Try to make each pair the same within itself but to
different to all the other pairs (eg. 1=red and yellow
stripes, 2=blue and white stripes etc)
§ After you have coloured 22 pairs, you will have 2
chromosomes left
§ If they are 2 X chromosomes, the cell belongs to a girl
§ If they are an X and a Y chromosome, the cell belongs
to a boy
1
6
16
9
20
1
8
19
13
3
5
Y
11
1
15
14
8
2
2
11
THE CENTRE FOR GENETICS EDUCATION 2007
A DAPTED FROM THE MCRI’S GOALS FOR GENES PROJECT 1999
1
5
1
7
21
10
16
2 1
7
2
8
4
6
3
X
7
3
10
1
2 7
X
19
13
12
14
20
12
4
5
16
15
1
8
7
7
6
22
10
21
X
19
22
10
16
21
12
1
9
2
2
2
6
15
4
14
20
1
8
7
14
15
5
1
7
11
19
13
3
4
21
9
1
8
13
8
8
20
11
9
12
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EDUCATION PACKAGE
HUMAN GENETICS IN PRIMARY SCIENCE
WORKSHEET 11 – YEARS 5 – 6 S TAGE 3
Human Genes
Living things are plants,
and humans.
Living things are made up of
.
All living things have
all
in their cells. So
, animals and humans have genes in
their cells.
Genes contain the
for making a living
thing grow and
.
Genes are made up of
and
so all plants, animals
have DNA.
So if all living things have genes made up of DNA,
why don’t we look like a
?…
…Because –
1. the
of genes is different in the cells
of a human and a tomato and
2. the
in the genes of a human
is also different to that of a tomato
number – humans –
information – genes –
type of information –
animals – tomato – cells –
DNA – plants – work
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
Tomatoes have
about 35 000 genes
Fruitflies have around
13 600 genes
Humans have about
20 000 – genes
Worms have 19 099
genes… that’s very
close to the number of
genes humans have!
Remember: Humans
don’t look like worms
because the type of
information in worm
genes is different to
that in human genes.
Honey Bees have 10 157
genes
All living things have genes.
THE CENTRE FOR GENETICS EDUCATION 2007
A DAPTED FROM THE MCRI’S GOALS FOR GENES PROJECT 1999
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