Cystic fibrosis is caused by a recessive allele. (Use "N" to stand for the normal, non-disease...

Cystic fibrosis is caused by a recessive allele. (Use "N" to stand for the normal, non-disease allele). If parents that are both heterozygous for cystic fibrosis have a child, what is the percent chance that the child will have the disease?

Expert Solution

Answer-

According to the given question-

Cystic fibrosis is due to the presence of recessive allele i.e. nn. When we make a cross between two parents that are heterozygous for cystic fibrosis i.e. Nn then their children will be-

Nn Nn

	N	n
N	NN (Normal)	Nn (Carrier, no Cystic fibrosis )
n	Nn (Carrier, no Cystic fibrosis )	nn (with Cystic fibrosis )

When we make a cross between parents which are heterozygous for Cystic fibrosis then there are 3 out of 4 children are normal which means that the chances of getting a normal child are 75 % and out of 3 children which are normal, 1 child in normal but 2 children are carriers for cystic fibrosis but 1 out of 4 children will be with cystic fibrosis which means that the chances of getting a child with cystic fibrosis are 25 %.

So if the heterozygous parents have a child then there are 75 % chances that the child will be normal and 25 % chances the child will be with cystic fibrosis.

gladiator answered 2 years ago

Cystic fibrosis is a rare disease caused by homozygosity for a recessive allele, and characterized by...

Cystic fibrosis is a rare disease caused by homozygosity for a recessive allele, and characterized by a build-up of mucus in the lungs and difficulty breathing. A woman whose maternal uncle had the disease is trying to determine the probability she and her husband could have an affected child. Her husband's sister died of the disease. Assuming the uncle and the sister are the only family members who had the disease, what is the chance that the couple's first child...

Cystic fibrosis is caused by a mutation in a single gene. Homozygotes for this mutant recessive...

Cystic fibrosis is caused by a mutation in a single gene. Homozygotes for this mutant recessive allele (ff) have cystic fibrosis. Within a population, 2% of people have cystic fibrosis. Assuming Hardy-Weinberg equilibrium, the frequency of heterozygotes in the population is 0.24. If inbreeding was common in this population, what would happen to the percentage of people who have cystic fibrosis over time?

Hemophilia is a disease caused by a recessive allele on the X chromosome. Use a Punnett...

Hemophilia is a disease caused by a recessive allele on the X chromosome. Use a Punnett square to help describe the offspring phenotypes from the cross: heterozygous female crossed to male with hemophilia.

Cystic fibrosis is genetic disease caused by mutations in the CFTR gene. The consequence of this...

Cystic fibrosis is genetic disease caused by mutations in the CFTR gene. The consequence of this is production of an abnormal transmembrane protein that is responsible for producing sweat, mucus, and digestive fluids. Explain in depth the correlation between the defective gene and the abnormal protein that is produced. Be sure to mention the process involved in protein production, whether or not those process(s) have occurred, and their end products. Provide details in your explanation and support your answer with...

Cystic Fibrosis is a disease caused by a defect in a Chloride ion transport channel protein....

Cystic Fibrosis is a disease caused by a defect in a Chloride ion transport channel protein. The channel performs a critical function in the lungs; thus, disease sufferers have trouble clearing mucous from their lungs, leaving them susceptible to opportunistic infections. Discuss how this protein may function (normally) in the lung & hypothesize on possible treatment schemes.

Cystic fibrosis is an autosomal recessive disease characterized by two copies of a mutated CFTR gene....

Cystic fibrosis is an autosomal recessive disease characterized by two copies of a mutated CFTR gene. If one in 100 people in the United States have cystic fibrosis and one in 5.0505050505 people are carriers for cystic fibrosis, calculate the number of individuals that are homozygous dominant. In other words, how many people would have two copies of the normal (non-mutated) CFTR gene. Use the Hardy-Weinberg equation and explain how you determined this.

1)Cystic fibrosis an autosomal recessive disorder caused by a single gene, affects the lungs, the pancreas,...

1)Cystic fibrosis an autosomal recessive disorder caused by a single gene, affects the lungs, the pancreas, the digestive system, and other organs, resulting in symptoms ranging from breathing difficulties to recurrent infections. Which of the following terms best describes this? A)incomplete dominance B)multiple alleles C)codominance D)epistasis E)pleiotropy 2)What is one function of a signal peptide during peptide translation? A)to terminate translation of the messenger RNA B)to signal the initiation of transcription C)to bind RNA polymerase to DNA and initiate transcription...

Question 15 - Cystic fibrosis is transmitted as a(n): X-linked recessive gene autosomal recessive gene autosomal...

Question 15 - Cystic fibrosis is transmitted as a(n): X-linked recessive gene autosomal recessive gene autosomal dominant gene chromosomal defect

A woman who is a carrier for the cystic fibrosis (cf) allele marries a man who...

A woman who is a carrier for the cystic fibrosis (cf) allele marries a man who is also a carrier. What percentage of the woman’s eggs will carry the cf allele?____________ What percentage of the man’s sperm will carry the cf allele?____________ The probability that they will have a child who carries 2 copies of the cf allele is equal to the percentage of eggs that carry the allele times the percentage of sperm that carry the allele. What is...

1) The DF508 allele, which causes cystic fibrosis in homozygotes, occurs at a frequency (0.02) in...

1) The DF508 allele, which causes cystic fibrosis in homozygotes, occurs at a frequency (0.02) in European populations that exceeds the background mutation rate in humans. This suggests that what process might be maintaining this relatively high allele frequency? Select one: a. Mutation b. Drift c. Selection d. None of the above 2) Which of the following could be used to differentiate two populations? Select one: a. Geography b. Allele frequencies c. Barriers to dispersal d. All of the above...

Question