sandgrubber Posted January 3, 2012 Share Posted January 3, 2012 (edited) We hear a lot about autosomal inheritance . . . also about popular sire syndrome. I found the following story interesting. It goes into both sex linked inheritance and sire lines into detail by example. The author traces his two dogs, and the top 30 winning border collies' pedigrees back to the time the stud books closed and speculates a little about it . . . thoughtfully . . . with a message, but without gloom, doom and judgement. http://www.astraean....sire-lines.html p.s. I found a good -- at least for me -- tutorial on sex linked chromosomes at http://www.ksu.edu/biology/pob/genetics/xlinked.htm It doesn't look like many dog genetic diseases are sex linked. Haemophilia, perhaps some vision problems. But who knows about complex genetics. Edited January 3, 2012 by sandgrubber Link to comment Share on other sites More sharing options...
Lowenhart Posted January 4, 2012 Share Posted January 4, 2012 What this article fails to point out is that very little genetic material is actually carried by the Y chromosome - it's mostly to do with creating the male phenotype. The vast majority (huge majority) of sex-linked genes have nothing to do with the Y chromosome and are part of the X chromosome which fathers can't give their sons. So father-son analysis of the Y chromosomes will not give you much details at all. You need to look at other chromosomes that are passed for proper analysis of diversity - the Y chromosome is not under the same selective pressures as the X and the rest of the genome. Link to comment Share on other sites More sharing options...
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