Question about turner syndrome?

would the diagnosis of Turner's syndrome in a single cell necessarily mean that every cell of the body would contain 45 chromosomes? explain your answer.

The first answer is incorrect. While turner is a genetic disease (resulting from one X chromosome and no Y) it can have "mosaic" expression. This means that some cells in a person's body can have a normal 46 chromosomes while others have 45. It depends on when the defect happened. If it happened when the embryo was a single cell, then every cell will have the defect. If it happens later, say when there are 8 cells, but only in one cell, then all the cells descended from the 45 chromosome cell will have the same, while the others are normal.

Yes, Turner's is a genetic illness that starts when the sperm hits the egg, so all cells come from that first fertilized cell.

http://www.google.com/search?q=turner+sy... should help

no . some cells may 45 chromosome's, others could have the second x chromosome as "normal" and some cells may have only part of the x missing....... this would be Mosaic turner Syndrome

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