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Thread: Noise Threshold On Autosomal DNA IBD Segment Matches

  1. #1
    J Man
    Guest

    Noise Threshold On Autosomal DNA IBD Segment Matches

    This is quite an interesting explanation/take in the noise threshold for autosomal IBD segment matches. What do others here think about this guy's interpretation?

    http://www.y-str.org/noise-threshold-on-atdna-matches/

  2. #2
    Registered Users
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    2,285
    Sex
    Location
    Canada
    Ethnicity
    Mixed Euro/Near East
    Nationality
    Canadian
    Y-DNA (P)
    R1a-YP4516/YP4807*
    mtDNA (M)
    H11a2a3

    Canada Franco-Manitoban European Union Ottoman Empire Russia Imperial United States Grand Union
    This guy doesn't know what he is talking about.

    After doing some research, I found that any segment length even on an unphased DNA which is greater than 3 cM is an IBD
    What research? Research of others shows that fake IBD segments have been routinely observed at 5 and 6 cM, and sometimes as large as 10 cM.

    The entire women of a town are often raped by the invading army in those days after killing every male.
    Really?

    If the population is 7 billion, with 10 genotypes, there are 700 million people for each genotype.
    False. You can only derive SNP rates empirically, not by making up figures Mathematically. Rates vary a lot from SNP to SNP and population to population.

    Proof using Cryptography
    You cannot compare a manmade code where each cypher character is equally probable to a genetic code where different letters code for different functions. In a cypher, "0" and "1" are neutral in their effects: in an amino acid, "A" and "C" can cause very different effects in an organism.
     

    Other ancestral Y lines:

    E1b-M81 Ukraine (Ashkenazi)
    E1b-V13 England
    I1-M253 Ireland
    I2-M423 Ukraine
    R1a-L176.1 Scotland
    R1b-L584 Syria/Turkey (Sephardi)
    R1b-L20 Ireland
    R1b-L21 (1)England; (2)Wales?>Connecticut
    R1b-L48 England
    R1b-P312 Scotland
    R1b-FGC32576 Ireland

    Other ancestral mtDNA lines:

    H1b2a Ukraine (Ashkenazi)
    H6a1a3 Ukraine
    K1a9 Belarus (Ashkenazi)
    K1c2 Ireland
    V7a Ukraine

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  4. #3
    J Man
    Guest
    Quote Originally Posted by AJL View Post
    This guy doesn't know what he is talking about.



    What research? Research of others shows that fake IBD segments have been routinely observed at 5 and 6 cM, and sometimes as large as 10 cM.



    Really?



    False. You can only derive SNP rates empirically, not by making up figures Mathematically. Rates vary a lot from SNP to SNP and population to population.



    You cannot compare a manmade code where each cypher character is equally probable to a genetic code where different letters code for different functions. In a cypher, "0" and "1" are neutral in their effects: in an amino acid, "A" and "C" can cause very different effects in an organism.
    Interesting thanks for your thoughts AJL.

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