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Question
Biology
In Barr-body (sex-chromatin)of a normal female:
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Q. In Barr-body (sex-chromatin)of a normal female:
Haryana PMT
Haryana PMT 2003
A
one of the X-chromosome of paternal side becomes inactive to form Barr-body
B
Y-chromosomes form Barr-body
C
heterochromatin condense near centre of nucleus to form Barr-body
D
one of the X-chromosome of maternal side becomes inactive and form Barr-body near nuclear membrane
Solution:
Correct answer is (d) one of the X-chromosome of maternal side becomes inactive and form Barr-body near nuclear membrane