Rett syndrome is a sex-linked dominant disease found on the X-chromosome. If the offspring of a certain cross have a 50% chance of receiving the disease, regardless of gender, which of the following statements is true?

Phil is diagnosed with X-linked muscular dystrophy (recessive). His parents do not have the disease. What is the chance that his sister also has muscular dystrophy?

Hemophilia is a sex-linked recessive mutation found on the X-chromosome. A healthy male mates with a female that is a carrier for the disease.

Which of the following statements is true?

Colorblindness is a sex-linked recessive condition. If a woman is a carrier for the colorblind trait has a child with a man that does not have the trait, what percent chance will their first child (regardless if it is a girl or boy) be colorblind?

Bill recently has been diagnosed with Fabry disease (X-linked recessive). Bill is planned on getting married to Emily. There is no history of Fabry disease in Emily's family. They both seek a genetic counseling for their future children. What is the percent chance of Bill and Emily having a baby girl with Fabry disease?