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Blood Relations Quiz 5 (10 MCQs)

This set of multiple-choice questions evaluates understanding of blood type genetics, recessive inheritance, and familial relationships. It covers concepts such as the ABO blood group system, blood type inheritance, and tracing familial connections like aunt, cousin, and sibling relationships. The questions test logical deduction and the ability to interpret blood relations and family structures.

Quiz Instructions

Select an option to see the correct answer instantly.

1. How is my father's mother's only daughter-in-law's sister related to me?

Correct Answer: Correct answer is: (A) Aunt.

Exam Relevance: GRE, GMAT, CAT, SSC, Banking Exams

Difficulty: Moderate

Concept notes: In blood relations, the relationship between individuals is determined by their familial connections. The term "aunt" refers to the sister of one's parent or the wife of one's uncle.

Common Mistakes: A common mistake is to confuse the relationship with a cousin or sister, which are different familial connections.

Explanations: Your father's mother is your grandmother. The only daughter-in-law of your grandmother is your father's wife, which is your mother. The sister of your mother is your aunt. Therefore, your father's mother's only daughter-in-law's sister is your aunt.

Option Analysis:

Option A: Correct. The sister of your mother is your aunt.
Option B: Incorrect. The sister of your mother is not your sister.
Option C: Incorrect. The sister of your mother is not your cousin.
Option D: Incorrect. The sister of your mother is not your mother.

2. If G is the son of H, H is the daughter of T, B is the brother of T and P is married to H, then which of the following statements is definitely true?

Correct Answer: Correct answer is: (A) P is the father of G.

Exam Relevance: GRE, GMAT, CAT, SSC, Bank PO

Difficulty: Moderate

Concept notes: In blood relations, the relationship between individuals is determined by familial connections. Here, G is the son of H, and P is married to H. Therefore, P is the father of G.

Common Mistakes: A common mistake is to assume that P could be the mother of G, but since the question specifies that P is married to H, and H is the mother of G, P must be the father.

Explanations: Given that G is the son of H and P is married to H, P must be the father of G. This is because in a typical family structure, the spouse of a parent is the other parent of the child. Therefore, P, being married to H, is the father of G.

Option Analysis:

Option A: P is the father of G. This is correct because P is married to H, who is the mother of G.
Option B: H is the daughter of B. This is incorrect because B is the brother of T, and H is the daughter of T, not B.
Option C: G is the only child of his parents. This is not necessarily true as the information provided does not specify if G has any siblings.
Option D: T has no sister. This is not necessarily true as the information provided does not specify if T has any sisters.

3. Pointing to a girl in the photograph, Umesh said, "Her mother's brother is the only son of my mother's father." How is the girl's mother related to Umesh?

Correct Answer: Correct answer is: (C) Aunt.

Exam Relevance: GRE, GMAT, CAT, SSC, Bank PO

Difficulty: Moderate

Concept notes: In blood relations, understanding the familial connections and their terminology is crucial. The statement "Her mother's brother is the only son of my mother's father" helps to establish the relationship between Umesh and the girl's mother.

Common Mistakes: A common mistake is to misinterpret the familial relationships described in the statement, leading to confusion about the exact relationship between Umesh and the girl's mother.

Explanations: The statement "Her mother's brother is the only son of my mother's father" indicates that the girl's maternal uncle is Umesh's paternal uncle. This means that Umesh and the girl's mother are cousins. Therefore, the girl's mother is Umesh's aunt.

Option Analysis:

Option A: Umesh's mother is not the girl's mother.
Option B: Umesh's sister is not the girl's mother.
Option C: The girl's mother is Umesh's aunt.
Option D: Umesh's grandmother is not the girl's mother.

4. If A is the brother of B; B is the sister of C; and C is the father of D, how D is related to A? (HINT: If D is Male, the answer is Nephew.If D is Female, the answer is Niece.)

Correct Answer: Correct answer is: (A) Cannot be determined.

Exam Relevance: GRE, GMAT, CAT, SSC, Bank PO

Difficulty: Moderate

Concept notes: In blood relations, the relationship between two individuals depends on the gender of the individuals involved. The relationship between A and D cannot be definitively determined without knowing the gender of D.

Common Mistakes: A common mistake is assuming a specific gender for D, which can lead to incorrect conclusions about the relationship.

Explanations: The relationship between A and D depends on the gender of D. If D is male, D would be A's nephew. If D is female, D would be A's niece. Since the gender of D is not specified, the exact relationship cannot be determined.

Option Analysis:

Option A: Correct. The gender of D is not specified, so the relationship cannot be definitively determined.
Option B: Incorrect. This assumes D is male, which is not given in the problem.
Option C: Incorrect. This assumes D is female and A is the father, which is not given in the problem.
Option D: Incorrect. This assumes D is male and A is the father, which is not given in the problem.

5. Mama Isabella has a blood type of O. Her son, Norman, has also a blood type of O. What is the blood type of Norman's father?

Correct Answer: Correct answer is: (D) O.

Exam Relevance: MCAT, USMLE, DAT, OAT

Difficulty: Moderate

Concept notes: Blood type inheritance is determined by the ABO blood group system. The O blood type is recessive, meaning an individual with blood type O must have two O alleles (OO). If both parents have blood type O, their children will also have blood type O.

Common Mistakes: A common misunderstanding is that the father's blood type can be any type (A, B, AB, or O) if the mother and child both have blood type O. However, the recessive nature of the O allele means that the father must also have blood type O to ensure the child inherits the O allele from both parents.

Explanations: Mama Isabella has blood type O, which means she has the genotype OO. Her son Norman also has blood type O, which means he has the genotype OO. For Norman to have blood type O, he must have inherited an O allele from both his mother and his father. Therefore, the father must also have blood type O (genotype OO) to pass on the O allele to Norman.

Option Analysis:

Option A: Blood type A is not possible because the father would need to pass on an A allele, which would result in Norman having blood type A or AB, not O.
Option B: Blood type B is not possible because the father would need to pass on a B allele, which would result in Norman having blood type B or AB, not O.
Option C: Blood type AB is not possible because the father would need to pass on either an A or B allele, which would result in Norman having blood type A, B, or AB, not O.
Option D: Blood type O is the correct answer because the father must have blood type O to pass on the O allele to Norman.

Mnemonic: O for O, O for O, O for O.

6. Pointing to a photograph Lata says, "He is the son of the only son of my grandfather." How is the man in the photograph related to Lata?

Correct Answer: Correct answer is: (A) Brother.

Exam Relevance: SSC, UPSC, Bank PO, MBA Entrance

Difficulty: Easy

Concept notes: In blood relations, the term "son of the only son of my grandfather" refers to the speaker's brother.

Common Mistakes: A common mistake is to assume the man in the photograph could be an uncle or cousin, but the phrase "only son" clarifies the relationship.

Explanations: Lata says, "He is the son of the only son of my grandfather." This means the man in the photograph is the son of Lata's father, making him Lata's brother.

Option Analysis:

Option A: Correct. The man in the photograph is Lata's brother.
Option B: Incorrect. The man is not Lata's uncle, as the phrase "only son" indicates he is Lata's sibling.
Option C: Incorrect. The man is not Lata's cousin, as the phrase "only son" indicates he is Lata's sibling.
Option D: Incorrect. The information provided is sufficient to determine the relationship.

7. Pointing to a lady in a photograph Rinku said, "She is the mother of my mother's husband". How is the lady related to Rinku?

Correct Answer: Correct answer is: (C) Grandmother (Paternal).

Exam Relevance: SSC, UPSC, GRE, GMAT

Difficulty: Moderate

Concept notes: In blood relations, the mother of one's mother's husband is the paternal grandmother.

Common Mistakes: A common mistake is to confuse the relationship with the maternal grandmother, who would be the mother of one's father's mother.

Explanations: Rinku's mother's husband is Rinku's father. The mother of Rinku's father is Rinku's paternal grandmother. Therefore, the lady in the photograph is Rinku's paternal grandmother.

Option Analysis:

Option A: The lady cannot be Rinku's sister as the relationship described is not consistent with a sibling relationship.
Option B: The lady cannot be Rinku's mother as the relationship described is not consistent with a mother-daughter or mother-son relationship.
Option C: The lady is Rinku's paternal grandmother, as she is the mother of Rinku's father.
Option D: The lady cannot be Rinku's maternal grandmother as the relationship described is not consistent with the mother of Rinku's mother.

8. Pointing to a photograph, a woman says, "This man's son's sister is my mother-in-law" . How is the woman's husband related to the man in the photograph?

Correct Answer: Correct answer is: (A) Grandson.

Exam Relevance: GRE, GMAT, CAT, SSC, Bank PO

Difficulty: Moderate

Concept notes: In blood relations, understanding the familial connections and tracing the relationships step-by-step is crucial.

Common Mistakes: A common mistake is to misinterpret the relationship between the woman's husband and the man in the photograph, leading to incorrect options like Son or Son-in-law.

Explanations: The woman states that "This man's son's sister is my mother-in-law." This means the man in the photograph has a son, and that son has a sister. The sister is the woman's mother-in-law. Therefore, the woman's husband is the son of the man in the photograph, making the woman's husband the grandson of the man in the photograph.

Option Analysis:

Option A: Correct. The woman's husband is the grandson of the man in the photograph.
Option B: Incorrect. The woman's husband is not the son of the man in the photograph, but his grandson.
Option C: Incorrect. The woman's husband is not the son-in-law of the man in the photograph, but his grandson.
Option D: Incorrect. The woman's husband is not the nephew of the man in the photograph, but his grandson.

9. G, M, P, V, Z and D are six members of a family. Z is the son of V. M is the brother of V. D and V are a married couple. P is the daughter of D. D is the sister of G.How is Z related to P?

Correct Answer: Correct answer is: (C) Brother.

Exam Relevance: GRE, GMAT, CAT, SSC, Bank PO

Difficulty: Moderate

Concept notes: In blood relations, understanding the familial connections and roles is crucial. Here, we need to determine the relationship between Z and P based on the given information.

Common Mistakes: A common mistake could be misinterpreting the familial roles, such as confusing the gender or the generation of the individuals.

Explanations: Z is the son of V. D and V are a married couple, making D the mother of Z. P is the daughter of D, making P the sister of Z. Therefore, Z is the brother of P.

Option Analysis:

Option A: Z cannot be the mother of P as Z is a son.
Option B: Z cannot be the sister of P as Z is a son.
Option C: Z is the brother of P as Z is the son of V and D, and P is the daughter of D and V.
Option D: Z cannot be the father of P as Z is a son.

10. There are six persons A. B, C, D, E and F. C is the sister of F. B is the brother of E's husband. D is the father of A and grandfather of F. There are two fathers, three brothers and a mother in the group. Who is the mother?

Correct Answer: Correct answer is: (D) E.

Exam Relevance: GRE, GMAT, CAT, SSC, Bank PO

Difficulty: Moderate

Concept notes: In blood relations, identifying the mother involves understanding the familial roles and relationships described in the problem.

Common Mistakes: A common mistake is to assume that the mother must be one of the siblings or a direct parent, without considering the roles of spouses and in-laws.

Explanations: D is the father of A and grandfather of F, which means A is the parent of F. Since C is the sister of F, A must be the mother of both C and F. B is the brother of E's husband, which implies that E is married to A's brother. Therefore, E is the mother of C and F.

Option Analysis:

Option A: A is the mother of C and F, but not the mother of the entire group.
Option B: B is the brother of E's husband, not the mother.
Option C: C is the sister of F, not the mother.
Option D: E is the mother of C and F, as she is married to A's brother.

Frequently Asked Questions

What is the primary focus of the blood relations topic?

The primary focus of blood relations is understanding familial connections and roles within a family tree, including parent-child relationships, sibling relationships, and extended family ties.

How does blood type inheritance relate to blood relations?

Blood type inheritance, such as the ABO blood group system, is determined by genetic factors passed from parents to children, which can help trace familial relationships and identify parent-child connections.

What is the significance of gender dependency in blood relations?

Gender dependency in blood relations can affect the inheritance of certain traits and can be crucial in determining specific familial roles and relationships, such as maternal vs paternal lineage.

How can relationship ambiguity be resolved in blood relations?

Relationship ambiguity in blood relations can be resolved through detailed family tree analysis, genetic testing, and understanding the inheritance patterns of blood types and other genetic markers.

What skills are developed through studying blood relations?

Studying blood relations develops skills in logical reasoning, relationship tracing, and understanding complex familial connections, which are useful in various fields such as genetics, anthropology, and genealogy.

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