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Standard XII

Biology

Estrogen and Its Functions

If BB represe...

Question

If BB represents barr body and $Y_{0}$ Y-body, XXY or Klinefelters syndrome has.

B B - 1, Y_{0} - 0

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B B - 1, Y_{0} - 1

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B B - 0, Y_{0} - 1

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B B - 2, Y_{0} - 1

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Solution

The correct option is B $B B - 1, Y_{0} - 1$
In humans with more than one X chromosome, the number of Barr bodies visible at interphase is always one fewer than the total number of X chromosomes. For example, men with Klinefelter syndrome (47, XXY karyotype) have a single Barr body, whereas women with a 47, XXX karyotype have two Barr bodies.

So, the correct answer is 'BB−1, Y0−1'.

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(iv)

\cos y \frac{d y}{d x} = e^{x}, y (0) = \frac{π}{2}

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If BB represents barr body and Y0 Y-body, XXY or Klinefelters syndrome has.

If BB represents barr body and $Y_{0}$ Y-body, XXY or Klinefelters syndrome has.