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If the spouse he or she has the gene needed to pass on cystic fibrosis, then yes it will have children with cystic fibrosis. If the spouse does not have that gene then the child will not have cystic fbrosis but will be a gene carrier of cystic fibrosis.
Wiki User
∙ 15y ago
Wiki User
∙ 13y agoTo have cystic fibrosis, a person must inherit two copies of the defective CF gene-one copy from each parent. If both parents are carriers of the CF gene (i.e., they each have one copy of the defective gene, but do not have the disease themselves), their child will have a 25% chance of inheriting both defective copies and having cystic fibrosis, a 50% chance of inheriting one defective copy and being a carrier, and a 25% chance of not having CF or carrying the gene.
If one parent has CF and other is a carrier, their child will have a 50% chance of being a carrier and a 50% chance of having CF. But if one parent has CF and the other parent is not a carrier and does not have CF, the child has a 100% chance of being a carrier, but will not have the disease.
Wiki User
∙ 14y agoif they are idential twins both of them will get it, if not there is 1 in 3 chance of each baby having cf
Wiki User
∙ 13y agoWhen two carriers have children, they have a one in four chance of having a child with CF each time they conceive.
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What is the chance that any child will have the disease if two parent who are carriers of cystic fibrosis?
Let's do a Punnit Square. T T T TT TT t Tt Tt T is normal, and the little "t" is the recessive gene (which is being carried by one parent). Since one parent is recessive, you can see that there's a 50% chance that the offspring will have the recessive gene as well. However, note that without any straight "tt" result, there is a 0% chance that the offspring can express the Tay Sachs disorder.
Why can a person have one copy of the CF allele and be perfectly normal?
CF is recessive, and as such, the gene for non-CF is dominant over this gene. The CF gene will only be expressed in the phenotype and as a characteristic if the person has two of the recessive alleles.
Can a baby be born with a CF gene if neither parent has the gene?
No
What does it mean that CF is a recessive gene?
The phenotype associated with a recessive gene is only expressed when two copies of the gene are present. For example, if a person has both a recessive allele and a dominant allele for CF, the person does not have CF. The person only has CF if he/she has two copies of the recessive allele.
How can a child with cystic fibrosis have two parents that do not have cystic fibrosis?
The parents will both have a specific gene defect. If they do there is then a 1 in 4 chance of them having a child with cf. so if you are considering having children you should have a blood test to find out if you are a carrier of the gene causing cf. hope that helps.
What is the chance that any child will have the disease if two parent who are carriers of cystic fibrosis?
Let's do a Punnit Square. T T T TT TT t Tt Tt T is normal, and the little "t" is the recessive gene (which is being carried by one parent). Since one parent is recessive, you can see that there's a 50% chance that the offspring will have the recessive gene as well. However, note that without any straight "tt" result, there is a 0% chance that the offspring can express the Tay Sachs disorder.
Why can a person have one copy of the CF allele and be perfectly normal?
CF is recessive, and as such, the gene for non-CF is dominant over this gene. The CF gene will only be expressed in the phenotype and as a characteristic if the person has two of the recessive alleles.
What is the risk in each pregnancy of having a child with cystic fibrosis?
By "another pregnancy", I assume that the parents have had one child with cystic fibrosis. As cystic fibrosis is recessive and neither parent suffers from it, they must both be carriers. That means the chances of the next baby having CF is 25%, or a one in four chance. Assuming both parents have one CF and one non-CF gene, the combinations work out: non-CF x non-CF (normal) non-CF x CF (carrier) CF x non-CF (carrier) CF x CF (cystic fibrosis sufferer) Therefore their chances of having a: normal child = 25% child who is a CF carrier = 50% child who suffers from CF = 25%
Is cystic fibrosis dominant or recessive?
Cystic Fibrosis is recessive. If you have one CF gene and one non-CF gene, you will be a carrier but not have CF.
Can a baby be born with a CF gene if neither parent has the gene?
No
What does it mean that CF is a recessive gene?
The phenotype associated with a recessive gene is only expressed when two copies of the gene are present. For example, if a person has both a recessive allele and a dominant allele for CF, the person does not have CF. The person only has CF if he/she has two copies of the recessive allele.
How can a child with cystic fibrosis have two parents that do not have cystic fibrosis?
The parents will both have a specific gene defect. If they do there is then a 1 in 4 chance of them having a child with cf. so if you are considering having children you should have a blood test to find out if you are a carrier of the gene causing cf. hope that helps.
Why the parents of someone with cystic fibris do not show any symptoms?
CF carriers do not show CF symptoms themselves, but can pass the problem CF gene to their children
What is the probability of the P female passing the rickets gene to the F generation?
If you are speaking of the rare type of rickets that is X-linked and when the mother has the gene, the chances are 1:1 or 50:50. See the link below for more information:
Are there any other ways to get cystic fibrosis?
No, it is a hereditary disease meaning it's only in the family and oth parents have to hold the gene for the child to get CF, you have to be born with CF you can't get it like the flu. Say the mother was a carrier of the CF gene but the Dad is not, the child would only be a carrier, but if both parents are then it's likely the child will have CF
What are the chances of a person with marfan syndrome passing it to their offspring?
Have a 50% chance of passing it on to there offspring. This is called an autosomal dominant gene. What that means is, considering each human has TWO sets of chromosomes (1 from mom, 1 from dad), it takes only ONE copy of the mutated gene being passed on for the child to inherit the syndrome. Because for the conception of each child there is a chance of passing one or the other gene on, there is a 1 in 2 or 50% chance of giving the child Marfan Syndrome.
How can a child have cystic fibrosis?
Cystic Fibrosis cannot be prevented. It is an inherited disease, so there is no possible way to prevent something inherited. One parent will be a carrier and so will the other parent, therefore resulting in the child having CF.
