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Say my mom has a gene (it's one of those regular gene, ignore X and Y chromosome)

The gene exist in p% of the population.

Things get complicated due to that p. If p is 100%, for example, then of course the probability that I have the gene to is 100%. If p is 1% then the probability that I got the gene will be 50%.

How to formalize this mathematically?

My gut feeling is it'll just be linear. if p is 1% then my chance will be 50.5% because that means my dad have a 1% chance to have that gamete.

Then i want to extend this to cousins.

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    What is gammete? How does it work between generations?2012-11-08
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    a gene? Did I spell that correctly?2012-11-08

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