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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.f 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% Ã 25% = 6.25%, alleles AA is 75% Ã 75% = 56.25%, alleles AO is 75% Ã 25% = 18.75%, alleles OA is 25% Ã 75% = 18.75%.
Genetics: Blood Types. Learn about the different blood types, how they were discovered, and what they mean. Learn about inheritance and changes in blood types. Find out why it is important to know your blood type and Rh factor. Includes quizzes, lesson plans, games, and movies.There are links to eThemes resources on basics of genetics, genes, DNA, and inherited blood diseases.enetics: Blood Types. Learn about the different blood types, how they were discovered, and what they mean. Learn about inheritance and changes in blood types. Find out why it is important to know your blood type and Rh factor. Includes quizzes, lesson plans, games, and movies.