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 |
Homework Answers
Daughter with Turner syndrome have only a single copy of X
chromosome, 45 X. Generally daugher have a combination of XX, One X
chromosome from mother and other from father. This condition arises
when a daughter inherits nothing from father. This situation arises
due to Nondisjunction (improper segregation of sex chromosomes) in
father. So if father sex chromosomes undergone nondisjunction it
will produce child with Turner syndrome. This
will take place in Meiosis I in father at the time of
spermatogenesis. It should be noted that in this situation egg gets
fertilized with sperm missing sex chromosome inside it. (due to
nondisjunction)
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An antigen found on red blood cells, Xg, is encoded by an X-linked allele (Xa) that...
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Match the genotypes of the parents and offspring to the parent
and cell division stage in which the nondisjunction must have
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please provide an explanation for both questions! Thank
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An antigen found on red blood cells, Xg, is encoded by an
X-linked allele (Xa) that is dominant over an allele for the
absence of the antigen (X–). Scientists studied the inheritance of
these X-linked alleles in children with chromosome abnormalities to
determine where nondisjunction of the sex chromosomes occurred.
Match the genotypes of the parents and offspring to the parent
and cell division stage in which the nondisjunction must have
occurred. Shown as parent × parent = child.
Nondisjunction...
If Jack and Jill have a child with an Aaa genotype, during which meiotic division, and in which parent, could nondisjunction have occurred? Select all that apply Meiosis I in the mother Meiosis I in the mother Meiosis I in the father Meiosis I in the father Submit Request Answer
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please provide an explanation for both questions! Thank
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