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This has been said many times, and I suggest you read the replies, and try to understand it, without blind ignorance. Cannot be A. This is because salt ions are not moved in osmosis, it is the water which is moved. Cannot be B. That statement is correct, but does not work with a...

You probably could, but I'd guess it is better to show your knowledge of how sex linked traits are passed on. Therefore, it is better to show it the punnet square way.

The likelihood of her getting the disease is not reliant on her siblings. The chances occur, by the sperm "meeting" the egg which has the particular gene. There is a 50% chance that the egg will have the gene. That cannot be changed by previous children.

Mate, you are wrong, as we are already told that Jack is a boy. Therefore you only have a choice between an affected boy, and an unaffected boy. Therefore, if Maria is affected, there is a 50% chance of Jack being colour blind.