2007-09-22 00:35:50 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Biology
In the females out of two X chromosomes, one remains inactivated(highly heterochromatised). This appears as a Barr body.If a female has three X chromosome( as in the superfemales), then there will be two Barr bodies. In case of Turner syndrome where there is only Xchromosome, there will be no Barr body. This is one of the points of Lyon's hypothesis.The idea is not to have double dose of similar genes in active state.
2007-09-25 02:41:56 · answer #1 · answered by Ishan26 7 · 0⤊ 0⤋
In a case of X-inactivation, every single gene located on the X chromosome will not be expressed.
2007-09-22 01:36:13 · answer #2 · answered by Anonymous · 0⤊ 0⤋
X - chromosome inactivation is when one of the female X chromosomes is deactivated. This occurs so that the female does not have twice as many gene products than males do.
2007-09-22 08:07:19 · answer #3 · answered by Laura 2 · 0⤊ 0⤋
Define X Inactivation
2017-02-24 04:05:36 · answer #4 · answered by ? 3 · 0⤊ 0⤋
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2016-05-20 22:51:52 · answer #5 · answered by ? 3 · 0⤊ 0⤋