Friday, July 29th, 2011 at
9:37 pm
A question asked by toni.chang: In Finland, the frequency of heterozygous carriers of cystic fibrosis is 1/80.?
In Finland, the frequency of heterozygous carriers of cystic fibrosis is 1/80. In a small Finnish city there is a Swedish immigrant community in which the heterozygous carrier frequency for cystic fibrosis is 1/22. What is the probability that a child born to a Finnish mother and a father from this Swedish population will suffer from the disease?
Chosen answer:
Answer by Peter S
1/80 x 1/22 = 1 in 1760
If you know better then please let us know below.
Technorati Tags: 1/80., carriers, cystic, fibrosis, Finland, frequency, heterozygous
Wednesday, June 29th, 2011 at
1:36 pm
A question from Mo: What is the percentage of carriers of cystic fibrosis in the united states?
It is estimated that 12 million people are carriers but I need it in a percentage for a question. Could anyone please give me an answer in a percentage and confirm that 12 million people are carriers?
Most detailed answer:
Answer by jandy
1 in 25,000. go to cff.org or CFWW.org. carriers don’t have the disease, if two carriers have a child, 1 in 4 of the kids gets it, but I’ve seen some families that 2 kids have it, est 30,000 people in the US has disease, 70,000 worldwide, many others not diagnosed.
Agree or disagree? Leave your own thoughts below.
Technorati Tags: carriers, cystic, fibrosis, percentage, states, united
Tuesday, June 7th, 2011 at
9:36 am
A question asked by cindy 529: What are the genotypic and phenotypic ratios of offspring when male and female carriers of cystic fibrosis m?
If you know the answer please help me and if you also know what is the genotype of a person that is the carrier of a disease and also what is the genotype of a person that has a disease it is because i get confused if it is Aa or aa for a person that has a disease or just carries it.
The No 1 answer:
Answer by Strut Your Stuff
Cystic fibrosis (CF) = autosomal recessive disease. You therefore need two copies of the gene to have the phenotype (i.e. show the disease). SO let’s say:
A = dominant (normal) allele
a = recessive (CF) allele
1. A normal non-carrier will have the genotype AA
2. A carrier (asymptomatic) will have the genotype Aa / aA [sometimes they write it both ways; it means the same thing]
3. A CF sufferer (symptomatic) will have the genotype aa
Agree or disagree? Leave your own thoughts below.
Technorati Tags: carriers, cystic, female, fibrosis, genotypic, male, Offspring, phenotypic, ratios
Friday, June 3rd, 2011 at
9:38 pm
A question asked by decemberkitty02: If two parents are carriers of cystic fibrosis (and do not have the disorder), what is the probability?
If two parents are carriers of cystic fibrosis (and do not have the disorder), what is the probability that their first child will have CF and their second child will not?
I thought that it would 3/16s? Is this correct?
The No 1 answer:
Answer by Russ
Theyre both Aa, so its {AA,Aa,Aa,aa}, so P(having the disease) = 1/4, and P(not having the disease) = 3/4
Multiply the two and you get 3/16. So you are correct
Agree or disagree? Leave your own thoughts below.
Technorati Tags: carriers, cystic, disorder, fibrosis, Parents, Probability
Sunday, May 29th, 2011 at
1:37 am
A question from Itri: If two people are carriers for cystic fibrosis, what is the probability that they will have a child with cy?
If two people are carriers for cystic fibrosis, what is the probability that they will have a child with cystic fibrosis?
The No 1 answer:
Answer by diendvo
This is a genetic question that requires a Punett square. Cystic fibrosis is a recessive trait, meaning you need 2 alleles for cystic fibrosis to display it phenotypically. So if you define “a” as the allele for cystic fibrosis, “A” is the normal allele. A carrier of cystic fibrosis will have the genotype: Aa. If you do a Punett square, you’ll discover that there’s a 1/4 chance the child will have the aa genotype and will have cystic fibrosis.
What do you think? Leave you answer below!
Technorati Tags: carriers, child, cystic, fibrosis, People, Probability, they
Tuesday, May 10th, 2011 at
9:37 am
A question asked by n0e c: Two carriers cystic fibrosis marry. What is their parent chance of having children with cystic fibrosis?
Cystic fibrosis is a genetic disease caused by recessive alleles.
Albinism is a condition caused by a recessive allele. A carrier of the albino trait and a non-carrier marry and are planning to start a family. What will be the genotypic ratio for their children? What is the percent chance that they will have albino children?
My chosen answer:
Answer by Jenn
25% chance of a child with CF, 50% chance of a child who is a carrier, 25 % chance of a child who is not a carrier and doesn’t have the disease.
Whether you agree or disagree, why not leave your own thoughts below.
Technorati Tags: carriers, chance, children, cystic, fibrosis, having, marry., parent, their
Thursday, May 5th, 2011 at
5:37 pm
Question posed by kelli: If Both parents are carriers for cystic fibrosis will each baby be born with it or at least a carrier?
1st pregnancy baby had full blown cf(rip), 2nd baby is just a carrier. Is it possible for the 3rd pregnancy not have cf or even be a carrier???
The No 1 answer:
Answer by kik
1/2 chance to being a carrier, 1/4 chance to having full blown, and 1/4 chance to being normal and not a carrier.
Just so you know, I know nothing about cystic fibrosis so yea….
Whether you agree or disagree, why not leave your own thoughts below.
Technorati Tags: baby, born, both, Carrier, carriers, cystic, each, fibrosis, least, Parents
Wednesday, March 2nd, 2011 at
1:37 pm
A question from ashleyrachelle_21: Do both Parents have to be Cystic Fibrosis carriers for a child to get it?
My son has alot of Respitory issues and has alot of weight gain problems as well. He is going tommorrow tohave a sweat test done…I have talked to my midwife to confirm that my CF carrier screening that was done during my prenatal blood work was negative but she was unsure about both parents having to be carriers for my child to get it. I have serached all day for answers and can not find a definite answer. PLEASE HELP!
Top answer:
Answer by JoyC
Yes, for someone to have the disease, two copies of the defective CF gene must be inherited—one from each parent.
Whether you agree or disagree, why not leave your own thoughts below.
Technorati Tags: both, carriers, child, cystic, fibrosis, Parents
Thursday, December 2nd, 2010 at
5:39 pm
A question from Microbiology2011: If two parents, are heterozygous carriers of the autosomal recessive gene causing cystic fibrosis,?
If two parents, are heterozygous carriers of the autosomal recessive gene causing cystic fibrosis,
have 5 children, what is the probability that: (8pts)
a. three will be normal?
b. four will have cystic fibrosis?
c. all are normal?
The best answer:
Answer by Julie
You’ve got a 50% chance of a carrier, 25% chance of one effected, and 25% of a normal offspring.
Chance of three being normal= .25x.25x.25… so 1.5625%
Chance of four having CF= .25x.25x.25x.25= .039%
chance of five being normal=.25x.25x.25x.25x.25= .097%
How about adding your own answer to the comments below!
Technorati Tags: autosomal, carriers, causing, cystic, fibrosis, gene, heterozygous, Parents, Recessive
