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Wix comments on An Alien God - Less Wrong

80 Post author: Eliezer_Yudkowsky 02 November 2007 06:57AM

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Comment author: [deleted] 29 October 2011 12:21:51AM *  0 points [-]

Your brother or sister shares half your genes.

This is rarely true, you share 50% of your genes with your mother an father each, but you can theoretically share anything from 0%-100% (Probably normal distribution curve), since your mother/father has 46 (23 pairs) chromosomes and you receive a single random chromosome from each pair (total 23 singles), that are then paired with 23 singles from your father/mother.

Note that I have not taken Chromosomal crossover into account.

Comment author: dlthomas 29 October 2011 12:31:47AM 0 points [-]

For a given rare genetic difference from the population at large, you have roughly 50% chance of sharing it with your sibling, a child of yours, or a given parent of yours. Absent some sort of green-beard effect, the effect of selection on each will be approximately the same and thus (getting poetic) similarly guide the hand of the Alien God.

Comment author: [deleted] 29 October 2011 12:47:19AM *  0 points [-]

Yes I agree and that was not something I was disputing. From one gene's point of view there is a 50-50 probability that your sibling carries that exact same gene.

I only pointed out: That you do not always (or even often) share 50 % of ALL your siblings genes. Edit: (From an organisms point of view)

Comment author: dlthomas 29 October 2011 12:50:37AM 0 points [-]

For sure.

Comment deleted 13 June 2012 12:59:44PM [-]