A human female with Turner syndrome (47, X) also expresses the X-linked trait hemophilia, as did her father. Which of her parents underwent nondisjunction during meiosis, giving rise to the gamete responsible for the syndrome?

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Answer 1

Textbook Question

Chapter 8, Problem 1NST

A human female with Turner syndrome (47, X) also expresses the X-linked trait hemophilia, as did her father. Which of her parents underwent nondisjunction during meiosis, giving rise to the gamete responsible for the syndrome?

Expert Solution & Answer

Summary Introduction

To determine: The parent whose genome has undergone nondisjunction during meiosis that resulted in a human female with Turner syndrome (47, X) along with X-linked trait hemophilia.

Introduction: Turner syndrome is a condition in which female which is born have only 45 chromosomes and the missing chromosome is an X-chromosome. Since the X chromosome is missing the various proteins which are coded by the X-chromosome are affected. Thy symptoms of turner syndrome include short stature, reproductive sterility, visual impairments, nonverbal learning disability and various other conditions.

Explanation of Solution

Aneuploidy is a condition in which a person loses only one chromosome but the other complementary chromosome is present. In non-disjunction the chromosomes are unable to separate the linked homologs or chromatids during mitosis or meiosis.

Hemophilia is an X-linked trait and since the father and daughter both are suffering from this condition, this implies that the X chromosome from the father was inherited to the girl. So, it can be concluded that the Turner’s syndrome arises due to non-disjunction observed in the mother, which prevents the entry of X-chromosome from the mother resulting in only a single X-chromosome that has been inherited from the father.

Conclusion

The Turner syndrome is a result of nondisjunction of the chromosomes during the formation of gamete in mother.

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A human female with Turner syndrome (45,X) alsoexpresses the X-linked trait hemophilia, as did her father.Which of her parents underwent nondisjunction during meiosis,giving rise to the gamete responsible for the syndrome?

A boy with Klinefelter syndrome (47,XXY) is born to a mother who is phenotypically normal and a father who has the X- linked skin condition called anhidrotic ectodermal dysplasia. The boy has patches of normal skin and patches of abnormal skin. Which of the following statemnets likely explains these observations? The father contributed the extra X chromosome in the son as a result of a non-disjunction in meiosis I during spermatogenesis. The mother contributed the extra X chromosome in the son as a result of a non-disjunction in meiosis II during oogenesis. The mother contributed the extra X chromosome in the son as a result of a non-disjunction in meiosis I during oogenesis. The father contributed the extra X chromosome in the son as a result of a non-disjunction in meiosis II during spermatogenesis. Either parent could have contributed to the extra X chromosome in the son as a results of disjunction in either meiosis I or meiosis II during…

A karyotype shows that a child has Klinefelter syndrome (47,XXY). If the child is also colorblind (due to a recessive X-linked allele), despite his parents having normal color vision, in which parent and stage of meiosis did nondisjunction occur? And explain why .

Answer 2

Textbook Question

Chapter 8, Problem 1NST

A human female with Turner syndrome (47, X) also expresses the X-linked trait hemophilia, as did her father. Which of her parents underwent nondisjunction during meiosis, giving rise to the gamete responsible for the syndrome?

Expert Solution & Answer

Summary Introduction

To determine: The parent whose genome has undergone nondisjunction during meiosis that resulted in a human female with Turner syndrome (47, X) along with X-linked trait hemophilia.

Introduction: Turner syndrome is a condition in which female which is born have only 45 chromosomes and the missing chromosome is an X-chromosome. Since the X chromosome is missing the various proteins which are coded by the X-chromosome are affected. Thy symptoms of turner syndrome include short stature, reproductive sterility, visual impairments, nonverbal learning disability and various other conditions.

Explanation of Solution

Aneuploidy is a condition in which a person loses only one chromosome but the other complementary chromosome is present. In non-disjunction the chromosomes are unable to separate the linked homologs or chromatids during mitosis or meiosis.

Hemophilia is an X-linked trait and since the father and daughter both are suffering from this condition, this implies that the X chromosome from the father was inherited to the girl. So, it can be concluded that the Turner’s syndrome arises due to non-disjunction observed in the mother, which prevents the entry of X-chromosome from the mother resulting in only a single X-chromosome that has been inherited from the father.

Conclusion

The Turner syndrome is a result of nondisjunction of the chromosomes during the formation of gamete in mother.

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Answer 3

Textbook Question

Chapter 8, Problem 1NST

A human female with Turner syndrome (47, X) also expresses the X-linked trait hemophilia, as did her father. Which of her parents underwent nondisjunction during meiosis, giving rise to the gamete responsible for the syndrome?

Expert Solution & Answer

Summary Introduction

To determine: The parent whose genome has undergone nondisjunction during meiosis that resulted in a human female with Turner syndrome (47, X) along with X-linked trait hemophilia.

Introduction: Turner syndrome is a condition in which female which is born have only 45 chromosomes and the missing chromosome is an X-chromosome. Since the X chromosome is missing the various proteins which are coded by the X-chromosome are affected. Thy symptoms of turner syndrome include short stature, reproductive sterility, visual impairments, nonverbal learning disability and various other conditions.

Explanation of Solution

Aneuploidy is a condition in which a person loses only one chromosome but the other complementary chromosome is present. In non-disjunction the chromosomes are unable to separate the linked homologs or chromatids during mitosis or meiosis.

Hemophilia is an X-linked trait and since the father and daughter both are suffering from this condition, this implies that the X chromosome from the father was inherited to the girl. So, it can be concluded that the Turner’s syndrome arises due to non-disjunction observed in the mother, which prevents the entry of X-chromosome from the mother resulting in only a single X-chromosome that has been inherited from the father.

Conclusion

The Turner syndrome is a result of nondisjunction of the chromosomes during the formation of gamete in mother.

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Answer 4

Textbook Question

Chapter 8, Problem 1NST

A human female with Turner syndrome (47, X) also expresses the X-linked trait hemophilia, as did her father. Which of her parents underwent nondisjunction during meiosis, giving rise to the gamete responsible for the syndrome?

Expert Solution & Answer

Summary Introduction

To determine: The parent whose genome has undergone nondisjunction during meiosis that resulted in a human female with Turner syndrome (47, X) along with X-linked trait hemophilia.

Introduction: Turner syndrome is a condition in which female which is born have only 45 chromosomes and the missing chromosome is an X-chromosome. Since the X chromosome is missing the various proteins which are coded by the X-chromosome are affected. Thy symptoms of turner syndrome include short stature, reproductive sterility, visual impairments, nonverbal learning disability and various other conditions.

Explanation of Solution

Aneuploidy is a condition in which a person loses only one chromosome but the other complementary chromosome is present. In non-disjunction the chromosomes are unable to separate the linked homologs or chromatids during mitosis or meiosis.

Hemophilia is an X-linked trait and since the father and daughter both are suffering from this condition, this implies that the X chromosome from the father was inherited to the girl. So, it can be concluded that the Turner’s syndrome arises due to non-disjunction observed in the mother, which prevents the entry of X-chromosome from the mother resulting in only a single X-chromosome that has been inherited from the father.

Conclusion

The Turner syndrome is a result of nondisjunction of the chromosomes during the formation of gamete in mother.

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Answer 5

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Answer 6

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Answer 7

Expert Solution & Answer

Summary Introduction

To determine: The parent whose genome has undergone nondisjunction during meiosis that resulted in a human female with Turner syndrome (47, X) along with X-linked trait hemophilia.

Introduction: Turner syndrome is a condition in which female which is born have only 45 chromosomes and the missing chromosome is an X-chromosome. Since the X chromosome is missing the various proteins which are coded by the X-chromosome are affected. Thy symptoms of turner syndrome include short stature, reproductive sterility, visual impairments, nonverbal learning disability and various other conditions.

Explanation of Solution

Aneuploidy is a condition in which a person loses only one chromosome but the other complementary chromosome is present. In non-disjunction the chromosomes are unable to separate the linked homologs or chromatids during mitosis or meiosis.

Hemophilia is an X-linked trait and since the father and daughter both are suffering from this condition, this implies that the X chromosome from the father was inherited to the girl. So, it can be concluded that the Turner’s syndrome arises due to non-disjunction observed in the mother, which prevents the entry of X-chromosome from the mother resulting in only a single X-chromosome that has been inherited from the father.

Conclusion

The Turner syndrome is a result of nondisjunction of the chromosomes during the formation of gamete in mother.

Answer 8

Expert Solution & Answer

Summary Introduction

To determine: The parent whose genome has undergone nondisjunction during meiosis that resulted in a human female with Turner syndrome (47, X) along with X-linked trait hemophilia.

Introduction: Turner syndrome is a condition in which female which is born have only 45 chromosomes and the missing chromosome is an X-chromosome. Since the X chromosome is missing the various proteins which are coded by the X-chromosome are affected. Thy symptoms of turner syndrome include short stature, reproductive sterility, visual impairments, nonverbal learning disability and various other conditions.

Explanation of Solution

Aneuploidy is a condition in which a person loses only one chromosome but the other complementary chromosome is present. In non-disjunction the chromosomes are unable to separate the linked homologs or chromatids during mitosis or meiosis.

Hemophilia is an X-linked trait and since the father and daughter both are suffering from this condition, this implies that the X chromosome from the father was inherited to the girl. So, it can be concluded that the Turner’s syndrome arises due to non-disjunction observed in the mother, which prevents the entry of X-chromosome from the mother resulting in only a single X-chromosome that has been inherited from the father.

Conclusion

The Turner syndrome is a result of nondisjunction of the chromosomes during the formation of gamete in mother.

Answer 9

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Answer 10

Expert Solution & Answer

Answer 11

Summary Introduction

To determine: The parent whose genome has undergone nondisjunction during meiosis that resulted in a human female with Turner syndrome (47, X) along with X-linked trait hemophilia.

Introduction: Turner syndrome is a condition in which female which is born have only 45 chromosomes and the missing chromosome is an X-chromosome. Since the X chromosome is missing the various proteins which are coded by the X-chromosome are affected. Thy symptoms of turner syndrome include short stature, reproductive sterility, visual impairments, nonverbal learning disability and various other conditions.

Answer 12

Explanation of Solution

Aneuploidy is a condition in which a person loses only one chromosome but the other complementary chromosome is present. In non-disjunction the chromosomes are unable to separate the linked homologs or chromatids during mitosis or meiosis.

Hemophilia is an X-linked trait and since the father and daughter both are suffering from this condition, this implies that the X chromosome from the father was inherited to the girl. So, it can be concluded that the Turner’s syndrome arises due to non-disjunction observed in the mother, which prevents the entry of X-chromosome from the mother resulting in only a single X-chromosome that has been inherited from the father.