Thames & Kosmos Genetics & DNA handleiding

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Thames & Kosmos

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Handleiding

HERES HOW

1. Cut out the individual chromosomes

from chromosome set A. Now you have

an enlarged set of the chromosomes

from a single human cell, a large model

of that which researchers routinely

examine from small blood samples

under the microscope.

2. Now turn all the individual chromo-

somes over so that you have them laid

out in black and white in front of you.

How many chromosomes are there?

3. Think about how you would organize

the chromosomes. According to the

rules of Gregor Mendel, all the programs

for features are doubled in each cell.

Can you see whether certain

chromosomes ﬁt together?

4. Organize the chromosomes in matched

pairs according to their sizes.

Examining

Chromosomes

YOU WILL NEED

→ chromosome sheet (set A)

→ plastic bag

→ scissors

BRAIN TEASER

Does a boy’s Y chromosome

come from his mother or his

father?

ANSWER:

5. To check whether you found the right pairs,

simply turn the cards over. You can tell by

their colors and numbers whether you

matched them up correctly.

6. Something doesn’t add up: There are 22

chromosome pairs, but there are two

individual chromosomes left over. Due to

their characteristic shape, they are called X

and Y chromosomes. They determine

whether the person is a boy or a girl. Boys

have one X and one Y chromosome, while

girls have two X chromosomes. So now you

can also tell whether your chromosome

puzzle is for a boy or a girl.

7. You can save the chromosome pieces in the

small plastic bag that is included with the

kit. Let your friends try the puzzle too!

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Cells and Chromosomes | 

EXPERIMENT 

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