Answer plz asap!


1. The number of Barr body can be calculated by the formula, number of X chromosome - 1. Turner's syndrome patient, who has 45 chromosomes and only one sex chromosome (an X), has no Barr bodies. Thus option 1 is correct.

2. Since one X chromosome is absent and total 45 chromosome are present, thus it is an example of aneuploidy. Thus option 1 is correct.

3. Females with Turner syndrome have rudimentary ovaries, hormone treatment may provide some relief but they still can't conceive naturally since they can't be completely cured of it. Thus they are always sterile. Option A is correct. 

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