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DNA and chromosomes worksheet - Free Printable

Educational worksheet: DNA and chromosomes worksheet. Download and print for classroom or home learning activities.

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1 a DNA
b Nucleus

2 a 38
b Horse
c (Bar should be drawn at 46)
d Chromosomes come in pairs, one from each parent.
e No
f The number of chromosomes is not related to the size or complexity of an organism. For example, shrimp have more chromosomes than humans.

3 a On chromosomes
b Making proteins

4 a Watson, Crick, Franklin, Wilkins
b
1 Watson and Crick helped build a correct double-helix model of DNA.
2 Franklin recognised the pattern on an X-ray photo.
3 Wilkins showed an X-ray photo to Francis Crick.
4 Franklin told Watson and Crick their model was wrong.
5 Franklin took a very good X-ray photo of DNA.

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