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Home Q & A Board Biology-Related Homework Help Genetics and Developmental Biology
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spacedievest spacedievest
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Posts: 5
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9 years ago
So I have a locus with 'n' number of known alleles. I'm trying to find out how many genotypes would be produced; I thought I would use the 'n choose 2' method, but I saw a response on here to another post that was 'n (n+1) / 2.'
Can someone explain why that would be the correct equation and not 'n choose 2'?
Thanks!
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#1
Educator
9 years ago
Hello, could you provide the URL where that suggestion was made?
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psyche360psyche360
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#2
Posts: 453
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9 years ago
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spacedievest Author
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#3
9 years ago
Thank you. Also, I did some research, and apparently the formula for adding the sum of all numbers up (like psych360 suggested) to 'n' IS the formula that was suggested in the other post.
    [n * ( n +1 )] / 2
Thanks, all!
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