Question

Cystic fibrosis is one of the most common autosomal recessive disorders. The carrier frequency in a...

Cystic fibrosis is one of the most common autosomal recessive disorders. The carrier frequency in a general population is 1/25. A woman who knows she is heterozygous for the mutation that causes cystic fibrosis (CF) marries a man with no family history of CF at all. What is the probability that they will produce a child that has cystic fibrosis?

Suppose the couple above has a child with cystic fibrosis. What is the chance that their second child will have it? Remember to explain why.

Homework Answers

Answer #1

The autosomal recessive disorder makes it 25% probability for the child to get the disease or carry the genes for CF. With each pregnancy, the child may or may not be affected by the disease as only the mother is heterozygote for it. The chances that the child will be produced with CF or cystic Fibrosis is around 25%. It is the carrier frequency.

Now lets us say the couple already have a child with cystic Fibrosis. The chances of the second child to have the disease also remain same because it depends on what genes are being inherited to the child. The child might get the gene for CF and it might be recessive or dominant. If it is recessive, the child do not suffer from the disease but carry the gene for it. If the child is dominant, the child carry the gene and also suffers from the disease.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Cystic fibrosis is one of the most common autosomal recessive disorders. The carrier frequency in a...
Cystic fibrosis is one of the most common autosomal recessive disorders. The carrier frequency in a general population is 1/25. A woman who knows she is heterozygous for the mutation that causes cystic fibrosis (CF) marries a man with no family history of CF at all. What is the probability that they will produce a child that has cystic fibrosis? Suppose the couple above has a child with cystic fibrosis. What is the chance that their second child will have...
Attached earlobe and cystic fibrosis are both autosomal recessive traits. A woman with attached earlobes, that...
Attached earlobe and cystic fibrosis are both autosomal recessive traits. A woman with attached earlobes, that is a carrier of cystic fibrosis, marries a man that is genotypically normal for cystic fibrosis and is a carrier of the attached earlobe trait. What is the probability that they will have a child with non-attached earlobes that is a carrier of cystic fibrosis? A- 1/4 B-1/16 C-1/2 D-3/4
Cystic fibrosis is an autosomal recessive disorder. Beth and Tom do not have cystic fibrosis but...
Cystic fibrosis is an autosomal recessive disorder. Beth and Tom do not have cystic fibrosis but each have a sibling with cystic fibrosis. Beth's parents and Tom's mother do not have the disease., but Tom's father does. Calculate the probability that if this couple has a child, the child will NOT have cystic fibrosis.
A phenotypically normal couple has had one normal child and a child with cystic fibrosis, an...
A phenotypically normal couple has had one normal child and a child with cystic fibrosis, an autosomal recessive disease.  The incidence of cystic fibrosis in the population from which this couple came is 1/500.  If their normal child eventually marries a phenotypically normal person from the same population, what is the risk that the newlyweds will produce a child with cystic fibrosis?
The Autosomal Recessive disease, Cystic Fibrosis (CF), runs in Jill’s family. Jill is unaffected. Based on...
The Autosomal Recessive disease, Cystic Fibrosis (CF), runs in Jill’s family. Jill is unaffected. Based on this data, select which of the following statements could be True? A. If Jill’s Paternal Aunt is affected and her Paternal Grandparents are unaffected. There is a 2/3 probability her father is a Carrier B. In the future, Jill’s parents have another child and that child has CF. Therefore, her parents have a 100% probability of being Carriers C. Jill could never produce a...
The Autosomal Recessive disease, Cystic Fibrosis (CF), runs in Jill’s family. Jill is unaffected. Based on...
The Autosomal Recessive disease, Cystic Fibrosis (CF), runs in Jill’s family. Jill is unaffected. Based on this data, select which of the following statements could be True? A. If Jill’s Paternal Aunt is affected and her Paternal Grandparents are unaffected. There is a 2/3 probability her father is a Carrier B. In the future, Jill’s parents have another child and that child has CF. Therefore, her parents have a 100% probability of being Carriers C. Jill could never produce a...
Among U.S. Caucasians, the frequency of the CF- allele causing the recessive autosomal disease cystic fibrosis...
Among U.S. Caucasians, the frequency of the CF- allele causing the recessive autosomal disease cystic fibrosis is 0.02. What is the Δq for the CF allele after one generation of random mating and selection?
Cystic fibrosis (CF) is caused by a recessive allele. A couple who do not have CF...
Cystic fibrosis (CF) is caused by a recessive allele. A couple who do not have CF have a child that has CF. What is the probability that if they have another child, that the child will be heterozygous for CF? 1/2 or 50% 1/4 or 25% 3/4 or 75% 0%
Question 5 Cystic fibrosis (CF) is a recessive gene disease meaning that a child has to...
Question 5 Cystic fibrosis (CF) is a recessive gene disease meaning that a child has to inherit a defective CF gene from each parent. This means that there is a 25% chance of a child having cystic fibrosis if both parents are CF carriers Hence the number of children with CF (in a family whose parents are CF carriers) has a binomial distribution with n = the number of children in the family and p= 0.25 i. In a family...
Question 5 Cystic fibrosis (CF) is a recessive gene disease meaning that a child has to...
Question 5 Cystic fibrosis (CF) is a recessive gene disease meaning that a child has to inherit a defective CF gene from each parent. This means that there is a 25% chance of a child having cystic fibrosis if both parents are CF carriers Hence the number of children with CF (in a family whose parents are CF carriers) has a binomial distribution with n = the number of children in the family and p= 0.25 i. In a family...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT