Saturday 12 January 2013

Child Blood Type Calculator




Blood Type Genetic Basis:


In genetics, blood type gene has two alleles, each allele has genotype A, B or O. 
The A and B are dominant, and O is recessive. So allele A combined with allele O is type A.
Similarly, BO is type B, AA is type A, BB is type B, OO is type O, and AB is type AB.
If both parents have type A blood, then the alleles could be AA or AO, thus the allele A frequency is 75%, allele O frequency is 25% for both parents.
So the chance of alleles OO is 25% × 25% = 6.25%, 
alleles AA is 75% × 75% = 56.25%, 
alleles AO is 75% × 25% = 18.75%, 
alleles OA is 25% × 75% = 18.75%.
Since AA, AO and OA are blood type A, and OO is blood type O, thus their child has 6.25% chance to be blood type O and 93.75% chance to be blood type A. 

The +/- is called the rhesus factor, with + being dominant, and - being recessive.
So if both parents are -, the kids are always -, otherwise the kids might be + or -. 


Child Blood Type Estimate Table:
Father's Blood Type
ABABO
Mother's
Blood
Type
AA/OA/B/AB/OA/B/ABA/O
BA/B/AB/OB/OA/B/ABB/O
ABA/B/ABA/B/ABA/B/ABA/B
OA/OB/OA/BO


Parent Blood Type Estimate Table:
Child's Blood Type
ABABO
One
Parent's
Blood
Type
AA/B/AB/OB/ABB/ABA/B/O
BA/AB/OA/B/AB/OA/ABA/B/O
ABA/B/AB/OA/B/AB/OA/B/ABImpossible
OA/ABB/ABImpossibleA/B/O
Source: http://www.endmemo.com/medical/bloodtype.php

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