A girl is born with Turner syndrome. Where did the non-disjunction event occur? In [ the...
A girl is born with Turner syndrome.
Where did the non-disjunction event occur?
In [ the father, the mother, either the father or the mother]
In [ meiosis I, meiosis II, either meiosis I or meiosis II ]
Homework Answers
Most people are born with two sex chromosomes. Boys inherit the X chromosome from their mothers and the Y chromosome from their fathers. Girls inherit one X chromosome from each parent. In girls who have Turner syndrome, one copy of the X chromosome is missing, partially missing or altered.
Turner syndrome is not caused by anything the parents did or did not do. The disorder is a random event during cell division that happens when a parent's reproductive cells in early stage of fetal development. As a result, some of an affected person's cells have the usual two sex chromosomes, and other cells have only one copy of the X chromosome.
ANSWER:
meiosis I, meiosis II, either meiosis I or meiosis II
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A girl is born with Turner syndrome.
Where did the non-disjunction event occur?
In [ the...
A girl is born with Turner syndrome. Where did the non-disjunction event occur? 1. In [...
A girl is born with Turner syndrome. Where did the non-disjunction event occur? 1. In [ the father, the mother, either the father or the mother] * please select an answer from the bracket 2. In [ meiosis I, meiosis II, either meiosis I or meiosis II ] * please select an answer from the bracket
Two normal parents have a daughter with hemophilia (an X-linked recessive disorder) that also has Turner...
Two normal parents have a daughter with hemophilia (an X-linked recessive disorder) that also has Turner Syndrome. a. Write out the cross as described above illustrating the genotypes and phenotypes of the parents and child. b. Did the non-disjunction event occur in the mother, the father, or could have occurred in either of the two parents? Did the nondisjunction event occur during meiosis I, meiosis II, or could it have occurred in either division during meiosis.
The non-disjunction event leading to klinefelter syndrome (XXY) from an XX mother and an XY father...
The non-disjunction event leading to klinefelter syndrome (XXY) from an XX mother and an XY father can occur in? a) Anaphase I of mother b) Anaphase I of father c) Anaphase II of mother d) A or B e) A or C f) A or B or C
Color-blindness is an X-linked recessive condition. A man with normal vision and a woman who is...
Color-blindness is an X-linked recessive condition. A man with normal vision and a woman who is color-blind have a child with Turner Syndrome. This child has normal vision. Where did the non-disjunction occur? In meiosis I of the mother In meiosis II of the mother In meiosis I of the father In meiosis II of the father In either meiosis I or II of the mother.
22. [9 PTS] Turner syndrome results when an individual has a genotype of XO (a single...
22. [9 PTS] Turner syndrome results when an individual has a genotype of XO (a single X chromosome), and no other sex chromosomes. Color-blindness results from mutation of a single gene on the X chromosome. A couple, both of whom have normal color vision, have a color-blind child with Turner's syndrome. a. Did non-disjunction occur in the mother, or the father, or is it impossible to tell? Explain your answer. (3 pts) (continued next page. b. In the space provided...
Two normal parents have a son with hemophilia (an X-linked recessive disorder) that also has Klinefelter...
Two normal parents have a son with hemophilia (an X-linked recessive disorder) that also has Klinefelter Syndrome. a. Write out the cross as described above illustrating the genotypes and phenotypes of the parents and child. b. Did the non-disjunction event occur in the mother, the father, or could have occurred in either of the two parents? c. Did the nondisjunction event occur during meiosis I, meiosis II, or could it have occurred in either division during meiosis.
a- A child is born with anuelpoidy (XXX) for their sex chromosomes. Can you determine...
a- A child is born with anuelpoidy (XXX) for their sex chromosomes. Can you determine whether the non-disjunction event that resulted in this anueploidy occurred in the mother or the father? b-If the anueploidy occurred in the father, would it have occurred during meiosis I or meiosis II? **please Explain***
A couple has a daughter with Turner syndrome, a condition in which only a single copy...
A couple has a daughter with Turner syndrome, a condition in which only a single copy of the X chromosome is present. This results from nondisjunction, the failure of the X chromosome to segregate properly during meiosis. During which meiotic division, and in which parent, could nondisjunction have occurred to produce a child with this condition? Meiosis I in the mother Meiosis II in the mother Meiosis I in the father Meiosis II in the father
A colorblind man married a normal woman. Their daughter who was phenotypically normal, married a normal...
A colorblind man married a normal woman. Their daughter who was phenotypically normal, married a normal man, and the couple had three kids – a normal boy, a color-blind boy, and a color-blind girl with Turner syndrome. Where does the non-disjunction occur? Select one: a. Allosome non-disjucntion during anaphase post-fertilization b. Allosome non-disjunction during anaphase I in the father c. Allosome non-disjunction during anaphase II in the mother d. X chromosome loss due to a translocation e. A and C
Non-disjunction errors during meiosis result in several human medical disorders. For each of the following possible...
Non-disjunction errors during meiosis result in several human medical disorders. For each of the following possible disorder indicate if the non-disjunction event could have taken place during maternal meiosis I, maternal meiosis II, paternal meiosis I, or paternal meiosis II by placing a check mark in the appropriate boxes. Maternal Paternal Disorder Meiosis I Meiosis II Meiosis I Meiosis II Down’s Syndrome (Trisomy 21) Kleinfelter Syndrome (XXY) XYY Males
22. [9 PTS] Turner syndrome results when an individual has a genotype of XO (a single X chromosome), and no other sex chromosomes. Color-blindness results from mutation of a single gene on the X chromosome. A couple, both of whom have normal color vision, have a color-blind child with Turner's syndrome. a. Did non-disjunction occur in the mother, or the father, or is it impossible to tell? Explain your answer. (3 pts) (continued next page. b. In the space provided...
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