OpenStudy (anonymous):

Please help! So confused. :( Blood type in humans is an example of trait that has multiple alleles. The alleles for type A blood and type B blood are codominant, and type O blood is recessive to both type A and type B. If a girl with type AB blood has a brother with type O blood and a sister with type B blood, which of the following genotypes could it be possible for their parents to have?

2 years ago
OpenStudy (anonymous):

i thiink the answer would be not positive tho AB and BO AB and OO AO and AB AO and BO

2 years ago
OpenStudy (anonymous):

A. AO and BO B. AB and OO C. AB and BO D. AO and AB

2 years ago
OpenStudy (anonymous):

i used this as a reference http://www.hobart.k12.in.us/jkousen/Biology/multalle.htm

2 years ago
OpenStudy (anonymous):

what do you mean not positive?

2 years ago
OpenStudy (anonymous):

and oh okay, im gonna go to it

2 years ago
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