Based on Lyon’s hypothesis, what will b | vedclass

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(b) Down&rsquo;s syndrome is a chromosomal abnormality in humans and is associated with an extra chromosome $21$ (i.e. chromosomal formula is $45 + xx

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$1$

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(b) Down&rsquo;s syndrome is a chromosomal abnormality in humans and is associated with an extra chromosome $21$ (i.e. chromosomal formula is $45 + xx = 47$),

while one of the two $x$-chromosomes becomes genetically inert and heteropycnotic and forms the Barr body.

Hence human female suffering from Down&rsquo;s syndrome contains $(2x -1 = 1)$ one Barr body.

Based on Lyon’s hypothesis, what will be the number of Barr bodies found in a human female suffering from Down’s syndrome

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