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The diagram shows a potato tuber that developed from the stem of a parent potato plant. Three shoots are starting to grow from the tuber.

How do the genotypes of the shoots compare with the genotypes of the tuber and of the parent?

1 ) 

They are all different.

2 ) 

They are all identical.

3 ) 

The shoots are identical to each other, but are different from the tuber and the parent.

4 ) 

The shoots are identical to the tuber, but are different from the parent.

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