Cystic Fibrosis is a homzygous recessive disease that affects 1 in 3400 people. What percent of the population are carriers?

The correct answer is = 0.02 or 2.5 percent approx.

Explanation:

Given:

CF is a recessive disease that affects 1 in 3400 people

The frequency of the recessive allele in the population (q2) -

= 1/3400

= 0.0002. Therefore, q is the square root, or 0.014.

The frequency of the dominant allele in the population (p)

= 1 - 0.014 = 0.986 (or 98.6%).

The percentage of s carriers in the population.

2pq equals the frequency of heterozygotes or carriers, then the equation will be as follows:

2pq = (2)(.986)(.014) = 0.02 or 2.5 percent approx.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.