Timothy's Wife Is Having Trouble Conceiving a Child Despite Reports

question 48

Multiple Choice

Timothy's wife is having trouble conceiving a child despite reports on her reproductive fitness being normal. However, on examining Timothy, the doctor determines that his testes are undeveloped, and that he has enlarged breasts. He also observes that Timothy is unusually tall, although his parents and grandparents are of short stature. The doctor informs Timothy that these symptoms are due to Timothy having an extra X chromosome, making him XXY instead of XY. Timothy most likely suffers from

• A) Down syndrome.
• B) Fragile X syndrome.
• C) Klinefelter syndrome.
• D) Turner syndrome.

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Definitions:

Alpha

A threshold value used in hypothesis testing that represents the level of significance, typically set at 0.05 or 0.01, indicating the probability of wrongly rejecting the null hypothesis.

Chi-square Statistic

A statistical measure used to determine if there is a significant relationship between two categorical variables.

Degrees of Freedom

The number of independent values or quantities that can vary in the calculation of a statistic.

Critical Value

A threshold in hypothesis testing that defines the boundary between the region where the null hypothesis is rejected and where it is not.