They haven't got an X chromosome to share between them!

A mother can pass on one of two X chromosomes.

A father, on the other hand, has only one X chromosome.

I think this knowledge is not learned, but it has something to do with the X chromosome.

This is because for the man to have a daughter, he has to pass on an X chromosome.

If the baby gets two X chromosomes, it will develop into a girl.

Two X chromosomes and a blue uniform may not be enough.

All the daughters of a man will share his only X chromosome.

Other cases may have no family history, meaning that the change in the X chromosome is a new one.

If you are female, your cells have two X chromosomes.

Then it was time for those with a double x chromosome to start.

For a woman to get the disease, both X chromosomes must be affected.

But boys have only one X chromosome so they are more likely to be affected.

No, the material has so far been seen on only about eight percent of the X chromosomes studied.

There are not enough X chromosomes around in many scientific fields.

Women with the syndrome are missing one or part of their second X chromosome.

Women have two X chromosomes, one of which is "switched off".

Males have only one X chromosome, derived from their mother.

This leaves men at a disadvantage since they only have one X chromosome.

Is there really anything to connect these women apart from two X chromosomes?

The genes on the X chromosome are apparently of two types.

If an embryo has two X chromosomes, it is female.

Overall, the functional X chromosome mostly comes from the mother.