Genetics Chromosomal Inversion problem

[David23454]

Homework Statement

Rewrite following sequence as double stranded molecule, with an inversion of the sequence between nucleotide 4 and 12.

5'-TCTCGCATGGTAGGT-3'

Homework Equations

none.

The Attempt at a Solution

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I've read in the textbook that you take the section and rotate it 180 degrees, then reinsert it. However I think that I'm not understanding this properly because when I do this, I get a 5' end that needs to be rejoined with another 5' end, and likewise with the 3' end:

Original: 5'-TCTCGCATGGTAGGT-3'
Taking out sequence which needs to be inverted: 5'-GCATGGT-3'
Invert: 3'-TGGTACG-5'
Inverted sequence:5'-TCTC-3' (3'-TGGTACG-5') 5'-AGGT-3' ...so I don't see how I can rejoin the inverted segment.

I feel like I'm missing something obvious, if someone could help me out with this it would be great.

 

[Ygggdrasil]

Remember that DNA is double stranded. When you rotate the DNA 180° will the same strand of DNA be on top?

 

[David23454]

Thanks!