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in the human population there are 3 alleles that control bloodtype. Alleles A and B are codominant, while allele i is recessiveto both alleles A and B. A person who is homozygous in the i allelehas blood type O. Consider a man with blood type AB and a womanwith blood type B. The woman has one parent of blood type O. Whatis the theoretical percentage of their offspring that will haveblood type A?

a. 25%
B. 50%
C. 75%
D. 100%
E. 0%

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28 Sep 2019
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Related questions

With respect to genetics, ABO blood types are controlled by asingle gene designated I, which has three alleles. The I A allelegives blood type A, I B gives blood type B, and i gives blood typeO. The I A and I B alleles are codominant and i allele is recessiveto both the I A and I B alleles.

Aside from the I alleles, there are two other genes that whenmutated affect ABO blood type inheritance. The first mutant isrecessive to wild type and is designated x. A homozygous xxindividual is phenotypically O for blood type no matter what thegenotype is of the I gene. For example, I A /I A x/x or I B /I Bx/x individuals are O type. The second mutant, is dominant to thewild type Y allele and is designated Yd . An individual carrying aYd allele is phenotypically blood type O no matter what thegenotype is of the I gene. For example, an I A /I A Y/Yd or I B /IB Y/Yd individuals is O.

a. Propose a biochemical model that explains the O phenotype ofthe recessive homozygous xx individual? Your model should explainthe biochemical function of the X gene in a wild type individualand should explain why the x mutation is recessive

Find the correct statement (may require you to draw pedigrees and Punnett squares) A) A father with A blood type and a mother with B blood type, will always produce
children that are AB
B) A person with ii alleles will produce red blood cell that contain glycolipids with
galactosamine and galactose sugars
C) A person with the A blood type can only give blood to an A or O individual
D) If an AB father conceives a child with an O mother, the children have a 50%-50%
chance of being either AB or O
E) Each person has three alleles of the blood type gene
F) The IA allele is codominant to the i allele
G) A person with a B blood type will produce antibodies against the A blood type antigen

In humans, the allele for A type and the allele for B type blood show codominance. A person with both alleles has blood type AB. Both A and B dominant type O. A person with an allele for type A blood and type O blood marries someone with an allele for type B blood and type O blood.

a.List the types of offsprings they could have and the probability for each blood type in the offspring. (A allele=I^A, B allele=I^B, O allele=i)

b. A young lady with type O blood gave birth to a babdy with type O blood. In a court case she claims that a certain young man is the father of her child. The man has a type A blood. Could he be the father? Can it be proven on this evidence alone that he is the father?

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