Copyright © 2011 InteractiveScienceLessons.com.

Copyright © 2011 InteractiveScienceLessons.com



Cut here,front side only

4cm


Cut here,front side only

4cm


This is a single chromosome. Every cell in your body contains 46 of them.

23 came from your mom, and 23 are from your dad.


Cut here

10cm


When chromosomes from your mom and dad join, the pair resembles an “X”.



Upon closer examination, chromosomes are made of a fine thread-like substance called DNA. It’s wound very tightly.

When chromosomes from your mom and dad join, the pair resembles an “X”.


18cm

First, draw a meandering line to the next cut


18cm

Next, draw lines opposite the first


Include “rungs”


DNA resembles a twisted ladder.



The “rungs” of DNA are made of bases.

Copyright © 2011 InteractiveScienceLessons.comA

A

TT

T

GC

CG

CG

GC

A



There are 4 bases: A, T, G, C. A’s only go with T’s, and G’s only with the C’s.

Copyright © 2011 InteractiveScienceLessons.comA

A

TT

T

GC

CG

CG

GC

A



There are 4 bases: A, T, G, C. A’s only go with T’s, and G’s only with the C’s.

A gene is a section of base pairs.


•So what is it about that makes you you?DNA

Copyright © 2011 InteractiveScienceLessons.com.

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