Search for content in message boards

Multiple long matches from putatively unrelated families

Replies: 20

Re: Multiple long matches from putatively unrelated families

Posted: 1 Jan 2014 6:16AM GMT
Classification: Query
I use the Rutgers site, which has several tools

http://compgen.rutgers.edu/RutgersMap/

This link is old, but it gives a visual representation of how the rate varies over each chromosome

http://web.archive.org/web/20070113005025/http://compgen.rut...

Note however that the cM unit is specifically designed to normalize the difference between hotspots and coldspots -- it's the *probability* of recombination. That is, for a 20cM segment, there is a 20% chance that a crossover point will occur somewhere within it, and on the flip side, there is an 80% chance that it will be passed on intact (if it survives the 50-50 chance of being passed on at all). There are some quirky regions of the genome where this doesn't work as well as expected. For instance, a chromosomal inversion, which might be found in some percentage of the population, will reduce the number of crossovers, since it won't align well with a normal chromosome.
SubjectAuthorDate Posted
Wilfred Stein 30 Dec 2013 4:01PM GMT 
smsitton 30 Dec 2013 7:45PM GMT 
Wilfred Stein 30 Dec 2013 8:01PM GMT 
Wilfred Stein 31 Dec 2013 6:45AM GMT 
Wilfred Stein 31 Dec 2013 7:02AM GMT 
KittyMCooper 31 Dec 2013 7:27AM GMT 
KittyMCooper 31 Dec 2013 7:32AM GMT 
Wilfred Stein 31 Dec 2013 9:44AM GMT 
Wilfred Stein 1 Jan 2014 9:46AM GMT 
APTurner 1 Jan 2014 1:16PM GMT 
per page

Find a board about a specific topic

  • Visit our other sites:

© 1997-2014 Ancestry.com | Corporate Information | New Privacy | New Terms and Conditions