**Genetics and Blood Type Inheritance in Paternity Cases****Question 3: Determining Paternity Based on Blood Type**Isabella has blood type O, and her son also has blood type O. She claims that her friend, Ivan, is the child’s father.a) Ivan’s blood type is A. Can he be excluded as the father on this evidence alone?b) Does the fact that Ivan’s mother has type A blood and his father has type AB blood exclude him from being the parent?c) Does the additional information that Ivan’s mother’s parents are both AB permit him to be excluded?**Detailed Analysis:**1. **Blood Type Inheritance:** - Blood type is determined by the ABO blood group system, which consists of four types: A, B, AB, and O. - Each person inherits one allele from each parent, and the combinations of these alleles determine the blood type. - Type A can be AA or AO. - Type B can be BB or BO. - Type AB is AB. - Type O is OO. Given this information, let's address each part of the question:2. **Part (a): Ivan’s blood type is A. Can he be excluded as the father on this evidence alone?** - Isabella (mother) is type O (OO), and her son is type O (OO). Since Isabella only carries the O allele, her son must inherit an O allele from his father as well. - Ivan is type A, which means he could be AA or AO. If Ivan is AO, he could pass the O allele to his son, making it possible for him to be the father. Therefore, on this evidence alone, Ivan cannot be excluded as the father.3. **Part (b): Ivan’s mother has type A blood and his father has type AB blood. Does this exclude him from being the parent?** - If Ivan's mother is type A, she can be either AA or AO. - His father is type AB, so he is AB. - Possible blood types for Ivan could be: - If his mother is AA: Ivan can be AA or AO. - If his mother is AO: Ivan can be AA, AO, or AB. - In any of the above cases, Ivan could still be AO, which means he could potentially pass an O allele to his son. Therefore, based

The ABO blood type is controlled by the I gene that has three alleles; IA, IB, and i. Both IA and IB…

3) Isabella has blood type O her son also has blood type O. She claims that her friend, Ivan, is the child's father. a) Ivan's blood type is A. Can he be excluded as the father on this evidence alone? b) Does the fact that Ivan's mother has type A blood and his father has type AB blood exclude him from being the parent? c) Does the additional information that Ivan's mother's parents are both AB permit him to be excluded?

3) Isabella has blood type O her son also has blood type O. She claims that her friend, Ivan, is the child's father. a) Ivan's blood type is A. Can he be excluded as the father on this evidence alone? b) Does the fact that Ivan's mother has type A blood and his father has type AB blood exclude him from being the parent? c) Does the additional information that Ivan's mother's parents are both AB permit him to be excluded?

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter19: Introduction To Genetics

Section: Chapter Questions

Problem 6CT: The ABO blood system has been used to settle cases of disputed paternity. Suppose, as a geneticist,...

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Hematology

Hematology is the branch of biology. Hematology is the medical field that deals with the treatment of blood disorders and cancers, such as hemophilia, leukemia, lymphoma, and sickle-cell anemia. Hematologists and hematopathologists are medical professionals who specialize in illnesses of the blood and its components.

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