e Quiz Module 11 Quiz ASSIGNM X O A https://eagleonline.hos.edu/courses/58059/qu

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e Quiz Module 11 Quiz ASSIGNM X O A https://eagleonline.hos.edu/courses/58059/quizzes/218243/take D Question 1 10 pts Disorders such as Turner syndrome may be caused by a failure of chromosomes to separate during meiosis. This failure is called (11. Question 2 10 pts In a dihybrid test cross, the occurrence of parental types at a frequency greater than 50% of the babies indicates that the two genes are [1] 10 pts Question3 A woman born with XX0X genotype would have a number of Barr bodies equal to [lul.

Explanation / Answer

Question 1 - Nondisjunction.

Nondisjunction results in daughter cells with abnormal chromosome numbers. It is also called aneuploidy. There are three forms of nondisjunction: failure of a pair of homologous chromosomes to separate in meiosis I, failure of sister chromatids to separate during meiosis II, and failure of sister chromatids to separate during mitosis.

Question 2

Dominant. Greater than 50% is only observed when the genes are dominant.

Question 3 - Two barr bodies

Men with Klinefelter syndrome (47,XXY karyotype) has a single Barr body, whereas women with a 47,XXX karyotype have two Barr bodies. Barr bodies can be seen on the nucleus of neutrophils.

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