(a) Explain the cause responsible in a human to have sex chromosomes as'XXY' instead of 'XX' or 'XY'.

(b) List any two ways such individuals are different from the normal being.

 

 

Answers (1)

a) Failure of segregation of chromatids during cell division cycle results in the gain of an extra X chromosome in a male after fertilization and it become XXY.

b) Gynaecomastia and Sterile individuals

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