Quiz 3 Submit on Moodle

Supppose the dominant allele "A" occurs 50% of the time. The recessive allele "a" must occur
1. 0%
2. 50%
3. 25%
4. 100%
Then, what is the probability of getting one dominant and one recessive gene, Aa?
1. 0.1
2. 0.9
3. 0.9 x 0.1
4. 2 x 0.9 x 0.1
If the gene frequencies are equal (0.5 A and 0.5 a) what are the probabilities for homozygous dominant, heterozygous and homozygous recessive?
1. 33% AA, 33% Aa and 33% aa
2. 50% AA, 25% Aa and 25% aa
3. 50% AA, 0% Aa and 50% aa
4. 25% AA, 50% Aa and 25% aa
Albinism occurs in every 1 in 10,000 people. What is p, the frequency of the recessive allele (a) for the disease?
1. p = 0.0001
2. p = 0.001
3. p = 0.01
4. p = 0.1
Assuming this value of p for albinism in a population, what is q (the frequency of the dominant allele, A)?
1. 0.90
2. 0.99
3. 0.10
4. 0.01
If p² is the frequency of the disease (homozygous recessive), what is the meaning of q²?
1. The frequency of carriers who do not have the disease.
2. The frequency of those heterozygous with respect to the disease.
3. The frequency of homozygous recessive.
4. The frequency of healthy non-carriers, (AA).
How do you calculate the numerical value of q²?
1. q² = (0.99)²
2. q² = 2(0.99)
3. q² = 2(0.99 x 0.01)
4. q² = (0.01)²
How is the numerical value of carriers calculated?
1. 2pq
2. pq
3. p² + q²
4. p² x q²