If you knew that a devastating late-onset inherited disease runs in your family (in other words, a disease that does not appear until later in life) and you could be tested for it at the age of 20, would you want to know whether you are a carrier? Would your answer be likely to change when you reach age 40?

Hello everyone here we have a question asking when a normal mother and a normal father have a color blind son and a normal son, who do you think carries the defective X. Gene? So women have two X. Genes. So if they have just one defective X. Gene doesn't necessarily mean they'll show the trait however males have one X. Gene. So if they have a defective X. Gene they will show the trait. So the father can't carry the defective X. Gene. Or he would show it and the normal son cannot carry the defective X. Gene. Or he would show it. Only the affected son can't show can't carry the defective X. Gene because he had to inherit it from somewhere. So that leaves us with be the mother. Thank you for watching. Bye.