Oleg Zabluda's blog
Friday, November 30, 2012
 
Bizarre simplistic mathematical model states the obvious - that men should care more about their sisters’ children...
Bizarre simplistic mathematical model states the obvious - that men should care more about their sisters’ children than their own.

If you are a man, and ignoring X/Y-chromosomes, your sister has 1/4 of alleles with both of your genes, 1/2 alleles with exactly one of your genes and 1/4 of alleles with zero of your genes. Your niece/nephew has 1/4*1+1/2*1/2+1/4*0=1/2 of alleles with exactly one of your genes, and 1/2 of alleles with zero of your genes.

Your own children will always have exactly one of your genes in every allele. But nobody knows for sure whether your "own" children have any of your genes or not. There is exactly 50/50 chances of either outcome (since your "own" child is always either yours or not yours), which exactly evens out the math-expectations, with equal risk, but less uncertainty for your niece/nephew, compared to your "own".

Duh.

Занимательная генетика -  продажная девка империализма Мендель отдыхает.

http://io9.com/5964318/bizarre-study-suggests-men-care-more-about-their-sisters-children-than-their-own
http://rspb.royalsocietypublishing.org/content/280/1751/20121937.full.pdf
http://io9.com/5964318/bizarre-study-suggests-men-care-more-about-their-sisters-children-than-their-own

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