Which of the following is TRUE of both Klinefelter syndrome and Turner syndrome? Both are the result of mitotic errors early in development. Both give rise to individuals who have external male genitalia. Both typically result from nondisjunction. It is the mechanism by which dizygotic, but not monozygotic, twins are produced.
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In humans, Down Syndrome can result from three copies of chromosome 21, translocation involving part of chromosome 21 and chromosome 14, reciprocal translocation between any two autosomes. It is possible to see human cases of aneuploidy in sex chromosomes (such as Turner syndrome and Klinefelter syndrome) but not in autosomes. This is because syndrome X inactivation compensates for the dosage of X chromosomes. XY chromosomes are more prone to nondisjunction and lagging in anaphase. Humans have a gene that prevents the formation of monosomic and trisomic gametes. None of the above answers is correct. During mitosis, if the chromosomes in a diploid tissue fail to separate correctly, the resulting daughter cells can be monoploid, tetrasomic, triploid, or tetraploid.
Sri K.
Klinefelter Syndrome is a condition resulting in individuals with the sex chromosome genotype XXY as a result of nondisjunction in meiosis. If an individual has Klinefelter's syndrome due to a nondisjunction in meiosis I in one of the parents, which parent did this error occur in? Group of answer choices: neither parent, this would only happen if it occurred in meiosis II; it could have been in either parent; the female parent; the male parent.
Bryan V.
In humans, XO individuals are females with Turner's syndrome and XXY individuals are males with Klinefelter syndrome. Which of the following events may not give rise to a Klinefelter male? A. Nondisjunction at meiosis I in the father. B. Nondisjunction at meiosis II in the father C. Nondisjunction at meiosis I in the mother. D. Nondisjunction at meiosis II in the mother.
Kerissa B.
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