Question

11. How many Barr bodies would be visible in the cells of: a. an XYY individual? b. an individual with Klinefelter Syndrome? C. an individual with Turner Syndrome? d. an XXX individual? 12. Two mothers give birth to sons at the same time at a busy urban hospital. The son of Couple 1 is afflicted with hemophilia (again, caused by an X-linked recessive mutation). Neither parent has the disease. Couple 2 has a normal son, despite the fact that the father has severe hemophilia. Several years later, Couple 1 sues the hospital, claiming the babies were swapped in the hospital. Does Couple 1 have a case based on the available information?

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Answer 1

Answer:

11).

a).XYY individual:

No. of Barr bodies = no. of X-chromosomes -1

= 1-1=0

b). Klinefelter syndrome= 44+XXY

No. of Barr bodies = 2-1=1

c)

Turner's syndrome= 44+X0

No. of Barr bodies = 1-1=0

d). XXX individual:

No. of Barr bodies= 3-1=2