Picture this sceneario: The identity of Kim’s biological father is unknown, but
ID: 11998 • Letter: P
Question
Picture this sceneario:The identity of Kim’s biological father is unknown, but it is thought to be either Kevin or Thomas. To determine which of the two men it is, blood typing of all the persons involved was performed. Here are the results of the blood tests, including the phenotypes and possible genotypes of each person:
•Rachel (mother) – Type AB; genotype IA, IB
•Kim (child) – Type A; genotype is either IA, IA (if homozygous) or IA, i (if heterozygous).
•Kevin (Alleged Father #1) – Type A; genotype is either IA,IA if homozygous, or IA,i if heterozygous.
•Thomas (Alleged Father #2) – Type O; genotype is ii.
QUESTION:
-There are 2 DNA bands in the "fingerprint" of each person tested: mother, child, allegued father 1 and allegued father 2. Why are there two bands for each person and not 3?
Explanation / Answer
The identity of Kim’s biological father is unknown, but it is thought to be either Kevin or Thomas. To determine which of the two men it is, blood typing of all the persons involved was performed. Here are the results of the blood tests, including the phenotypes and possible genotypes of each person:
•Rachel (mother) – Type AB; genotype IA, IB
•Kim (child) – Type A; genotype is either IA, IA (if homozygous) or IA, i (if heterozygous).
•Kevin (Alleged Father #1) – Type A; genotype is either IA,IA if homozygous, or IA,i if heterozygous.
•Thomas (Alleged Father #2) – Type O; genotype is ii.
QUESTION:
-There are 2 DNA bands in the "fingerprint" of each person tested: mother, child, allegued father 1 and allegued father 2. Why are there two bands for each person and not 3?
as each person blood group is decided by combination of two alleles.
each type allele create unique DNA pattern
even blood group is a multiple allele trait