QUESTION Cystic fibrosis is an inherited disease that causes humans to produce abnormally thick mucus within the lungs that can result in fatal infections. It is only found in individuals with two recessive copies of a defective gene. In the United States about 1 in 3500 people are born each year who are homozygous recessives and suffer from cystic fibrosis. Calculate the frequency of this recessive gene amongst those born each year in the United States.
Added by Craig M.
Close
Step 1
We are given that 1 in 3500 people are born with cystic fibrosis, which means they have two recessive alleles (homozygous recessive). Let's call the frequency of the recessive allele q. Show more…
Show all steps
Your feedback will help us improve your experience
Kaela Piechowicz and 88 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Cystic fibrosis is an inherited recessive disorder that causes especially thick mucus to build up in the lungs and digestive tract. The mucus makes it difficult to clear micro-organisms from the airways, so people with cystic fibrosis are prone to dangerous respiratory infections. Among Caucasians, about one in every 3000 newborns is affected by this condition. Determine the frequency of the cystic fibrosis allele among Caucasians. What proportion of this population would you expect to be heterozygous carriers of the cystic fibrosis allele? Express your answers as decimals. (2 marks)
Bryan V.
Cystic fibrosis is a homozygous recessive condition that affects 1 in 10,000 of the Hispanic population in the United States. Calculate the frequency of the dominant allele, the frequency of the recessive allele, and the percentage of heterozygous individuals (carriers) in the Hispanic population.
Madhur L.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD