Guest guest Posted February 29, 2004 Report Share Posted February 29, 2004 Hold on: there is a link for this: http://www.genetics.com.au/Genetics2004/FactSheets/18.asp and besides, the pictures are charming! Love, n Inheritance question If someone has CF and they have a child will that child have CF or what are the chances? Family is wondering thanks ------------------------------------------- The opinions and information exchanged on this list should IN NO WAY be construed as medical advice. PLEASE CONSULT YOUR PHYSICIAN BEFORE CHANGING ANY MEDICATIONS OR TREATMENTS. ------------------------------------ Quote Link to comment Share on other sites More sharing options...
Guest guest Posted February 29, 2004 Report Share Posted February 29, 2004 Hi , Let's say that " Parent A " has CF. If " Parent A " has CF then with each pregnancy, " Parent A " will have a child that is always a carrier (because each child will always inherit a CF gene from " Parent A " ). If " Parent A " has CF but " Parent B " does NOT have CF -- or is NOT a CF carrier -- then each child will only be a carrier, but each child will NOT have CF. However, if " Parent A " and " Parent B " both have CF, then all children will have CF (because each child inherits a CF gene from " Parent A " and " Parent B " ). Now, if by chance " Parent A " has CF and " Parent B " is a CF carrier, then each child has a 75% chance of having CF (because each child automatically inherits a CF gene from " Parent A, " and there's a 25% chance of inheriting a CF gene from the carrier " Parent B " ). Or is that 75% supposed to be 50%? Well, the scenarios still stand correct, it's just my percentage that may be off by 25%. Kim Mom to (24 with CF) and (21 without CF, though is likely a carrier) > If someone has CF and they have a child will that child have CF or > what are the chances? > Family is wondering > thanks Quote Link to comment Share on other sites More sharing options...
Guest guest Posted February 29, 2004 Report Share Posted February 29, 2004 Wow, n... great site, thanks! I can use this with my biology students! Kim > Hold on: there is a link for this: > http://www.genetics.com.au/Genetics2004/FactSheets/18.asp > and besides, the pictures are charming! Love, n Quote Link to comment Share on other sites More sharing options...
Guest guest Posted February 29, 2004 Report Share Posted February 29, 2004 If a person with cf has a child, the child will definately get the cf gene from the parent with cf, and has a 1 in 25 chance of getting a defective cf gene from the other parent (in the U.S., at least, where one of every twenty-five people in the general population carry one faulty cf gene.) So, basicly, the child has about a 4% chance of having cf. If the other parent is a carrier of a cf gene (genetic testing can be done to find out, and while it isn't 100% accurate, it's pretty good) then the chance of the child having cf jumps up to 50%. That said, most people with cf don't have children. Most men with cf are sterile and most women with cf have difficulty becoming pregnant. Of course, if you talk to actual families of children with cf, you will get the distinct impression that statistics play no part in cf at all. Although there is only a one in four chance of two carriers having a child with cf with each pregnancy, several couples have had more than one child with cf and none without. It's like saying that there is a very low probability that you will be struck by lightning, and an even lower chance that you will be struck twice. It's not much consolation to know that while you are lying electrified, on the grass, smelling your singed hair, for the second time. :/ ~ > If someone has CF and they have a child will that child have CF or > what are the chances? > Family is wondering > thanks Quote Link to comment Share on other sites More sharing options...
Guest guest Posted February 29, 2004 Report Share Posted February 29, 2004 ; that was pretty good! If awe-inspiring! Love, n Re: Inheritance question If a person with cf has a child, the child will definately get the cf gene from the parent with cf, and has a 1 in 25 chance of getting a defective cf gene from the other parent (in the U.S., at least, where one of every twenty-five people in the general population carry one faulty cf gene.) So, basicly, the child has about a 4% chance of having cf. If the other parent is a carrier of a cf gene (genetic testing can be done to find out, and while it isn't 100% accurate, it's pretty good) then the chance of the child having cf jumps up to 50%. That said, most people with cf don't have children. Most men with cf are sterile and most women with cf have difficulty becoming pregnant. Of course, if you talk to actual families of children with cf, you will get the distinct impression that statistics play no part in cf at all. Although there is only a one in four chance of two carriers having a child with cf with each pregnancy, several couples have had more than one child with cf and none without. It's like saying that there is a very low probability that you will be struck by lightning, and an even lower chance that you will be struck twice. It's not much consolation to know that while you are lying electrified, on the grass, smelling your singed hair, for the second time. :/ ~ > If someone has CF and they have a child will that child have CF or > what are the chances? > Family is wondering > thanks ------------------------------------------- The opinions and information exchanged on this list should IN NO WAY be construed as medical advice. PLEASE CONSULT YOUR PHYSICIAN BEFORE CHANGING ANY MEDICATIONS OR TREATMENTS. ------------------------------------ Quote Link to comment Share on other sites More sharing options...
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