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X Chromosomes

Replies: 2

Re: X Chromosomes

Posted: 22 Oct 2013 3:25AM GMT
Classification: Query
The father has only one X, so the X chromosome he passes to a daugher will be exactly the same as his. The mother's two X chromosomes can recombine just like the autosomes. SMGF has a nice animation showing the inheritance pathway of the X:

http://www.smgf.org/education/animations/x_chromosome.jspx

Since not all ancestors can make a contribution to the X, you can eliminate at least some of them as possibilities. There will never be two males in a row. See the diagrams on Blaine Bettinger's site:

http://www.thegeneticgenealogist.com/2008/12/21/unlocking-th...

http://www.thegeneticgenealogist.com/2009/01/12/more-x-chrom...

Ann
SubjectAuthorDate Posted
DSUAREZ 22 Oct 2013 6:50AM GMT 
APTurner 22 Oct 2013 9:25AM GMT 
DSUAREZ 22 Oct 2013 2:56PM GMT 
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