According to the SNP data alone which men could potentially

According to the SNP data alone, which men could potentially be the father? please explian

According to the SNP data alone, which men could potentially be the father? Taking all of the analyses into consideration, who is most likely the father? man 1 man 2 man 3 man 4

Solution

single nucleotide polymorphism is a variation of DNA sequence and this occurs when a single nucleotide (A,G,C,T) in the genome between members of the species or paired chromosomes in an individual. There are 10 million SNP in human genome. Child receives half of their DNA from each parent mom and dad).

One of the SNP from mother and the other from father will give the child SNP. In SNP marker 1 mother has AA, man has GA and the child will receive one A from mother, one G from man and forms AG.

If both the parents are heterozygous (CG-mom, CG-dad) , the child can be homozygous GG or heterzygous CG.

Man 4 could not be the father of child as SNP marker 4 has mother GG, father AA and child as GG.

Man 1 could be the father of the child.

Reference:

1. http://isogg.org/wiki/Single-nucleotide_polymorphism