QUESTION 5 The fact that somatic cells inactivate all but one X chromosome Is the reason that female cells have Barr bodies Explains why only female cats can have a tortoiseshell pattern Would explain the presence of Barr bodies in men with Klinfelter's syndrome All of the above QUESTION 6 Polypolidy Is very rare in animals Involves an extra chromosome Is very common in plants Both (A) and (C)
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How many Barr bodies are found per cell in each of the following situations? a. A male with Klinefelter syndrome. b. A female with Triplo-X syndrome that has a gene deletion such that the Xic regions have been deleted from all three of the X chromosomes in each of her cells. c. A female with 46, XX; however, the Tsix genes on each X chromosome are nonfunctional, while the Xist genes on each X chromosome are functional.
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