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Question
Number of Barr body in XXXX female is
Number of Barr body in XXXX female is
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Solution
The correct option is C 3
Females have two X chromosomes and males have one X chromosome and one Y chromosome. One X chromosome contains essential genes. The other X chromosome of the female is inactivated during embryonic development. Barr body is an inactive X chromosome present in a female cell. The number of Barr body is one less than the number of X-chromosomes. In the given example, there are total 4 X chromosomes. Hence, the number of Barr bodies are 4 - 1 = 3.Thus, the correct answer is option C.
Females have two X chromosomes and males have one X chromosome and one Y chromosome. One X chromosome contains essential genes. The other X chromosome of the female is inactivated during embryonic development. Barr body is an inactive X chromosome present in a female cell. The number of Barr body is one less than the number of X-chromosomes. In the given example, there are total 4 X chromosomes. Hence, the number of Barr bodies are 4 - 1 = 3.
Thus, the correct answer is option C.
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