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Inheriting Chromosomes

Genetics as it applies to evolution, molecular biology, and eugenics.

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Inheriting Chromosomes

Postby Lenore on Fri May 09, 2008 9:00 pm

What is the probability you receive exactly 8 of your autosomes from your mother's mother and 14 from your mother's father?
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Postby mith on Fri May 09, 2008 10:08 pm

Zero.
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Enjoying one moment at a time;
Accepting hardships as the pathway to peace;
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Postby MrMistery on Sat May 10, 2008 9:16 am

not quite 0, but very small anyway...
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Re: Inheriting Chromosomes

Postby F4T32008 on Sun May 11, 2008 4:04 pm

Lenore wrote:What is the probability you receive exactly 8 of your autosomes from your mother's mother and 14 from your mother's father?


Can we really inherit the chromosomes from our mother's mother and our mother's father?

Because I only know that we can inherit chromosomes from our parents.
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Postby MichaelXY on Sun May 11, 2008 11:37 pm

http://www.ucl.ac.uk/~ucbhjow/b241/mendel_1.html
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Postby MrMistery on Mon May 12, 2008 5:40 pm

i think it asks for maternal chromosomes that your mother originally inherted from her mother/father
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Postby tittu on Tue May 13, 2008 2:20 am

Total possibilities = 2^22 = 4194304 , because any one of your 22 maternal autosomes has 2 possible sources.
Favourable cases = 22C8 (the binomial coefficient, factorial 22/(factorial 8 x factorial 14) ) = 319770 (ways to select which 14, or which 8 from where.)
So total probability = (319770/2^22) = (319770/4194304) = 0.07623
About 7 %
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