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What are is the percentages of a child not having cystic fibrosis with parents who both have the trait?
If both parents are just carriers of the gene that causes CF then there is a 75% chance that the child will not have CF. To break it down farther... 25% chance that they will have CF. 50% that they will be a carrier. 25% that they will have two normal genes.
What is a punnett square for cystic fibrosis?
A Punnett square for cystic fibrosis would involve crossing two parents who are carriers of the recessive allele for the disease (denoted as "cf"). The square would show the probability of having a child with cystic fibrosis (25%), a carrier (50%), or unaffected by the disease (25%). Each parent would have a genotype of "Cf" (carrier) for the Punnett square.
Name two genetic disorders?
Two genetic disorders are Turner's syndrome and cystic fibrosis.
Does cystic fibrosis have extra chromosomes?
No, cystic fibrosis is caused by mutations in the CFTR gene, not by the presence of extra chromosomes. Individuals with cystic fibrosis inherit two faulty copies of the CFTR gene, one from each parent, which leads to the production of a defective CFTR protein that affects the movement of salt and water in and out of cells.
Cystic fibrosis autosomal dominant?
hey I'm not positive but I believe that Cystic Fibrosis is autosomal. My reasonning for this is that there seems to be an equal number of females that have cystic fibrosis as there are males. I AM NOT POSITIVE.
What would a genetic counselor tell parents who had cystic fibrosis or were carries of the cystic fibrosis about the chances of their children having cystic fibrosis?
If both parents are carriers then the child has a 25% chance of having cystic fibrosis. If one parent has CF and the other the other was just a carrier then the child has a 50% chance of having CF. If one parent has CF and the other has two normal genes then there is no chance of the child having CF. If one parent is a carrier and the other has two normal genes then there is no chance of the child having CF. If both parents have CF then there is a 100% chance that the child will also have CF.
What are is the percentages of a child not having cystic fibrosis with parents who both have the trait?
If both parents are just carriers of the gene that causes CF then there is a 75% chance that the child will not have CF. To break it down farther... 25% chance that they will have CF. 50% that they will be a carrier. 25% that they will have two normal genes.
What is the probability of two healthy people where one is a carrier being parents to a child born with cystic fibrosis?
If only one person is a carrier of cystic fibrosis than there is no chance of having a child with it. Both parents have to be carriers and even then there is only a 25% chance. If only one carries than there is a 50% chance that their children will carry but will not have cystic fibrosis.
If a grandfather has cystic fibrosis what is the chance his grandchild inherits it?
Cystic fibrosis is an autosomal recessive genetic disorder, meaning a child must inherit two mutated copies of the CFTR gene (one from each parent) to have the condition. If the grandfather has cystic fibrosis, he carries two copies of the mutated gene. The chance of the grandchild inheriting cystic fibrosis depends on the genetic status of the child's parents; if neither parent is a carrier of the CFTR mutation, the child cannot inherit the condition. If one parent is a carrier, the child has a 25% chance of being affected.
A family pedigree of two unaffected parents with a child who suffers from cystic fibrosis?
You will start with the child first and build up backwards. You will then be able to figure out the parents and perhaps even further up.
How can one child be born healthly and second one have cystic fibrosis?
To have a child with cystic fibrosis both parents must be a carrier or a sufferer. A carrier is a person who has one healthy gene, and one diseased gene, so they dont have cystic fibrosis but they can pass it on to their children. Children inherit one gene from each parent. To get cystic fibrosis a child must get two copies of the 'disease' gene - one from each parent. If two carriers have children, each child has a 25% chance not getting a Cystic fibrosis disease gene, 50% of being a carrier and 25% of being a sufferer. This is not affected by if the child is male or female. So essentially the answer is bad luck.
How can you get cystic fibrosis?
For a baby to be born with Cystic Fibrosis, both parents must be carriers of the faulty CF gene. Where both parents carry the faulty gene, each child has a one in four chance of having CF, a two in four chance of being a carrier and a one in four chance of not having any CF genes.
Do you need one or two parents to inherit cystic fibrosis?
you need two parents to get it but one parent to become a carrier. You need two parents with one of the alleles to inherit it but if you have one parent with the allele you might be a carrier. If you have two parents with the allele it does not mean that you will definitely have it. This is because the allele for cystic fibrosis is recessive.
How is a child born with cystic fibrosis?
Cystic fibrosis is genetic and is not contagious A person gets it when he/she inherits two mutated genes off each parent. A healthy couple can have a child with Cystic fibrosis because the parents would be carriers of the disease (even though they are unaffected by it themselves). 25% of children are at risk of the disease as it can be passed down from previous generations.
What is the genotype of two normal parents who have a child with cystic fibrosis?
The genotype would have to be homozygous recessive if the child was completely effected by the disease. The "normal" paretns would have to have heterozygous recessive genotypes. This makes sense since the allele that causes sickle cell shows incomplete dominance when present with a normal allele in a pair. The "normal" parents actually would have a mixture of sickle cell shaped red blood cells combined with normal shaped ones. The carrier parents does not display symptoms of the disease since the regular red blood cells alone can fill the body's need for oxygen under normal circumstances. The only time the cArrier would notice would be under times of extreme oxygen demand, such as a sprint.
A couple who are both carriers of the gene for cystic fibrosis have two children who have cystic fibrosis What is the probability that their next child will be phenotypically normal?
If both parents are carriers on cystic fibrosis, just because two children may have the disease it doesn't mean that say,a further 3 children in future will be "normal". Inheriting genes is like a lottery. I can say though that because cystic fibrosis is recessive, every offspring born under carriers will always have a 75% chance of being phenotypically normal.
Can you get Cystic fibrosis?
Cystic fibrosis is a genetic disease and can only be inherited through genes. It all depends on your parents alleles. Let's say that the allele for cystic fibrosis is c. If your Mum has the allele Cc it means she is hetrozygous. If you Dad has the same allele he is also hetrozygous. When they had children, the two small c's could come together to make a child with the alleles cc. (This means that the child has cystic fibrosis and has homozygous reccessive alleles.) When they had children their alleles could also come together to make CC (homozygous dominant- this means that person doesn't carry an allele for cystic firbrosis and will never get it. This means that if that person had children with another person who has the alleles CC, their child wouldn't get it), or it could make a child with Cc alleles. The child with Cc alleles wouldn't get cystic fibrosis because the allele big C (dominant allele) over powers the allele small c (reccessive- the cystic fibrosis allele). Although this person doesn't have cystic fibrosis their children might because they carry the allele for cystic fibrosis, which is c.
