Sometimes there are multiple possibilities for a particular gene When there are more than 2...

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Sometimes there are multiple possibilities for a particular gene When there are more than 2 possible alleles the dominance relationships of all the alleles must be determined An example of a trait governed by multiple alleles is ABO blood type There are 3 alleles A B B for the gene that codes for a protein located on the surface of red blood cells I I and i I and I are co dominant I codes for the A protein while I codes for the B protein When both and I are present both proteins are made Therefore and I are co dominant Both and I are dominant over i which does not code for any membrane protein Genotypes for human blood types are shown below 11 orli AB 88 Il orli ii Type A Type AB Problem 1 ABO Blood Types 8 Peter is heterozygous for Type A blood He marries Lynn who has type O blood Based upon their known genotypes what is the possibility they could have a child with Type A blood Solve a Punnett Square to estimate this probability Show your work below Type B Type O

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