Number of Barr bodies in XXXX female is - DASH

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Number of Barr bodies in XXXX female is

3

1

2

4

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Step-by-Step Explanation Step 1: Understanding Barr Bodies A Barr body is a condensed mass of chromatin found in the nucleus of female mammalian somatic cells. It forms when one of the X chromosomes in a female somatic cell becomes inactivated during early embryonic development. Step 2: Relationship Between X Chromosomes and Barr Bodies In general, the number of Barr bodies present in a somatic cell is always one less than the total number of X chromosomes. Mathematically, if the number of X chromosomes is $n$, the number of Barr bodies is given by: $ \text{Number of Barr bodies} = n - 1 $ Step 3: Applying the Rule to XXXX Females For an XXXX female, there are 4 X chromosomes. Hence, using the rule: $ \text{Number of Barr bodies} = 4 - 1 = 3 $ Conclusion Thus, in a female with four X chromosomes (XXXX), the total number of Barr bodies in each somatic cell is 3.

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